Lung damage by thoron progenies versus possible damage redemption by lung stem cells: a perspective

References

• Amanat B, Kardan MR, Faghihi R, Hosseini Pooya SM. 2013. Comparative measurements of radon concentration in soil using passive and active methods in High-Level Natural Radiation Area (HLNRA) of Ramsar. J Biomed Phys Eng. 3(4):139–144.
   PubMedGoogle Scholar
• Axelsson G, Andersson EM, Barregard L. 2015. Lung cancer risk from radon exposure in dwellings in Sweden: how many cases can be prevented if radon levels are lowered? Cancer Causes Control. 26(4):541–547.
   PubMed Web of Science ®Google Scholar
• Bailey MR, Ansoborlo E, Guilmette RA, Paquet F. 2007. Updating the ICRP human respiratory tract model. Radiat Prot Dosimetry. 127(1–4):31–34.
   PubMed Web of Science ®Google Scholar
• Bair WJ. 1989. Human respiratory tract model for radiological protection: a revision of the ICRP Dosimetric Model for the Respiratory System. Health Phys. 57:249–252.
   PubMed Web of Science ®Google Scholar
• Bale WF. 1980. Hazards associated with radon and thoron. Health Phys. 38(6):1062–1610.
   Web of Science ®Google Scholar
• Barcinski MA, Abreu MD, De Almeida JC, Naya JM, Fonseca LG, Castro LE. 1975. Cytogenetic investigation in a Brazilian population living in an area of high natural radioactivity. Am J Hum Genet. 27(6):802.
   PubMed Web of Science ®Google Scholar
• Barthel FH. 2007. Unconventional nuclear fuel. Proceedings of the IAEA Technical Mtg Uranium Small-Scale and Special Mining and Processing Techniques; 19–22 June; Vienna.
   Google Scholar
• Beddow H, Black S, Read D. 2006. Naturally occurring radioactive material (NORM) from a former phosphoric acid processing plant. J Environ Radioact. 86(3):289–312.
   PubMed Web of Science ®Google Scholar
• Bhaskaran R, Damodaran RC, Kumar VA, Panakal John J, Bangaru D, Natarajan C, Sathiamurthy BS, Mundiyanikal Thomas J, Mishra R. 2017. Inhalation dose and source term studies in a tribal area of Wayanad, Kerala, India. J Environ Public Health. 2017:1–10.
   Web of Science ®Google Scholar
• Borm PJ, Schins RP, Albrecht C. 2004. Inhaled particles and lung cancer, part B: paradigms and risk assessment. Int J Cancer. 110(1):3–14.
   PubMed Web of Science ®Google Scholar
• Bose B, Najwa AR, Shenoy S. 2019. Oxidative damages to eye stem cells, in response to, bright and ultraviolet light, their associated mechanisms, and salvage pathways. Mol Biotechnol. 61(2):145–152.
   PubMed Web of Science ®Google Scholar
• Bustamante-Marin XM, Ostrowski LE. 2017. Cilia and mucociliary clearance. Cold Spring Harb Perspect Biol. 9(4):a028241.
   PubMed Web of Science ®Google Scholar
• Cambra-López M, Aarnink AJ, Zhao Y, Calvet S, Torres AG. 2010. Airborne particulate matter from livestock production systems: a review of an air pollution problem. Environ Pollut. 158(1):1–7.
   PubMed Web of Science ®Google Scholar
• Carabajal E, Massari N, Croci M, Martinel Lamas DJ, Prestifilippo JP, Bergoc RM, Rivera ES, Medina VA. 2012. Radioprotective potential of histamine on rat small intestine and uterus. Eur J Histochem. 56(4):48302.
   Web of Science ®Google Scholar
• Chege MW, Hashim N, Nyambura C, Mustapha A, Hosada M, Tokonami S. 2019. Radon and Thoron; radioactive gases lurking in earthen houses in Rural Kenya. Front Public Health. 7:113.
   PubMed Web of Science ®Google Scholar
• Chen L, Acciani T, Le Cras T, Lutzko C, Perl AK. 2012. Dynamic regulation of platelet-derived growth factor receptor alpha expression in alveolar fibroblasts during alveolarization. Am J Respir Cell Mol Biol. 47(4):517–527.
   PubMed Web of Science ®Google Scholar
• Chen TR, Tung CJ, Cheng YS. 1998. Nanometer particle size and concentration from thoron radiolysis. Aerosol Sci Technol. 28(2):173–181.
   Web of Science ®Google Scholar
• Cheng YS, Su YF, Yeh HC, Swift DL. 1993. Deposition of thoron progeny in human head airways. Aerosol Sci Technol. 18(4):359–375.
   Web of Science ®Google Scholar
• Cieślar-Pobuda A, Yue J, Lee HC, Skonieczna M, Wei YH. 2017. ROS and Oxidative Stress in Stem Cells. Oxid Med Cell Longevity. 2017:1–2.
   Google Scholar
• Curradi G, Walters MS, Ding BS, Rafii S, Hackett NR, Crystal RG. 2012. Airway basal cell vascular endothelial growth factor-mediated cross-talk regulates endothelial cell-dependent growth support of human airway basal cells. Cell Mol Life Sci. 69(13):2217–2231.
   PubMed Web of Science ®Google Scholar
• D'Amato G, Cecchi L, D'amato M, Liccardi G. 2010. Urban air pollution and climate change as environmental risk factors of respiratory allergy: an update. J Investig Allergol Clin Immunol. 20(2):95–102.
   PubMed Web of Science ®Google Scholar
• Darby S, Hill D, Auvinen A, Barros-Dios JM, Baysson H, Bochicchio F, Deo H, Falk R, Forastiere F, Hakama M, et al. 2005. Radon in homes and risk of lung cancer: collaborative analysis of individual data from 13 European case-control studies. BMJ. 330(7485):223–226.
   PubMed Web of Science ®Google Scholar
• De Proost I, Pintelon I, Wilkinson WJ, Goethals S, Brouns I, Van Nassauw L, Riccardi D, Timmermans J-P, Kemp PJ, Adriaensen D. 2009. Purinergic signaling in the pulmonary neuroepithelial body microenvironment unraveled by live cell imaging. FASEB J. 23(4):1153–1160.
   PubMed Web of Science ®Google Scholar
• Degterev A, Yuan J. 2008. Expansion and evolution of cell death programmes. Nat Rev Mol Cell Biol. 9(5):378–390.
   PubMed Web of Science ®Google Scholar
• Deknudt G. 1982. Cell kinetics and radiosensitivity of human lymphocytes stimulated by Phytohemagglutinin, Wistaria floribunda or Lentil lectin. Can J Genet Cytol. 24(6):761–769.
   PubMedGoogle Scholar
• Ding B-S, Nolan DJ, Guo P, Babazadeh AO, Cao Z, Rosenwaks Z, Crystal RG, Simons M, Sato TN, Worgall S, et al. 2011. Endothelial-derived angiocrine signals induce and sustain regenerative lung alveolarization. Cell. 147(3):539–553.
   PubMed Web of Science ®Google Scholar
• Doi M, Kobayashi S, Fujimoto K. 1992. A passive measurement technique for characterization of high-risk houses in Japan due to enhanced levels of indoor radon and thoron concentrations. Radiat Prot Dosim. 45(1–4):425–430.
   Web of Science ®Google Scholar
• Du Y, Xu X, Chu M, Guo Y, Wang J. 2016. Air particulate matter and cardiovascular disease: the epidemiological, biomedical and clinical evidence. J Thorac Dis. 8(1):E8–E19.
   PubMed Web of Science ®Google Scholar
• Fakhri Y, Mahvi AH, Mohsen SM, Moradi B, Langarizadeh G, Zandsalimi Y, Jafarzadeh S, Mirzaei M. 2015. Assessment risk of lung cancer from inhalation of Radon 222 and Thoron (Radon 220) of indoor air in staff cement storage warehouses; Minab city, Iran. Int J Curr Microbiol Appl Sci. 4:814–824.
   Google Scholar
• Fano U. 1963. Penetration of protons, alpha particles, and mesons. Annu Rev Nucl Sci. 13(1):1–66.
   Google Scholar
• Füri P, Farkas Á, Madas BG, Hofmann W, Winkler-Heil R, Kudela G, Balásházy I. 2020. The degree of inhomogeneity of the absorbed cell nucleus doses in the bronchial region of the human respiratory tract. Radiat Environ Biophys. 59(1):173–183.
   PubMed Web of Science ®Google Scholar
• Ghiassi-Nejad M, Mortazavi SM, Cameron JR, Niroomand-Rad A, Karam PA. 2002. Very high background radiation areas of Ramsar, Iran: preliminary biological studies. Health Phys. 82(1):87–93.
   PubMed Web of Science ®Google Scholar
• Ghorai A, Sarma A, Chowdhury P, Ghosh U. 2016. PARP-1 depletion in combination with carbon ion exposure significantly reduces MMPs activity and overall increases TIMPs expression in cultured HeLa cells. Radiat Oncol. 11(1):126.
   PubMedGoogle Scholar
• Giangreco A, Reynolds SD, Stripp BR. 2002. Terminal bronchioles harbor a unique airway stem cell population that localizes to the bronchoalveolar duct junction. Am J Pathol. 161(1):173–182.
   PubMed Web of Science ®Google Scholar
• Gibbons MA, MacKinnon AC, Ramachandran P, Dhaliwal K, Duffin R, Phythian-Adams AT, van Rooijen N, Haslett C, Howie SE, Simpson AJ, et al. 2011. Ly6Chi monocytes direct alternatively activated profibrotic macrophage regulation of lung fibrosis. Am J Respir Crit Care Med. 184(5):569–581.
   PubMed Web of Science ®Google Scholar
• Hamada N, Fujimichi Y. 2014. Classification of radiation effects for dose limitation purposes: history, current situation, and future prospects. J Radiat Res. 55(4):629–640.
   PubMed Web of Science ®Google Scholar
• Hauri D, Spycher B, Huss A, Zimmermann F, Grotzer M, von der Weid N, Weber D, Spoerri A, Kuehni CE, Röösli M, et al.; for the Swiss National Cohort. 2013. Domestic radon exposure and risk of childhood cancer: a prospective census-based cohort study. Environ Health Perspect. 121(10):1239–1244.
   PubMed Web of Science ®Google Scholar
• Hofmann W, Menache MG, Graham RC. 1993. Radon progeny dosimetry in the rat lung. Health Phys. 64(3):279–290.
   PubMed Web of Science ®Google Scholar
• Hofmann W. 1982. Cellular lung dosimetry for inhaled radon decay products as a base for radiation-induced lung cancer risk assessment. Radiat Environ Biophys. 20(2):95–112.
   PubMed Web of Science ®Google Scholar
• Hofmann WE, Daschil FR. 1986. Biological variability influencing lung dosimetry for inhaled 222Rn and 220Rn decay products. Health Phys. 50(3):345–367.
   PubMed Web of Science ®Google Scholar
• Hong KU, Reynolds SD, Watkins S, Fuchs E, Stripp BR. 2004. Basal cells are a multipotent progenitor capable of renewing the bronchial epithelium. Am J Pathol. 164(2):577–588.
   PubMed Web of Science ®Google Scholar
• International Atomic Energy Agency (IAEA). 2003. Potential of thorium based fuel cycles to constrain plutonium and reduce long lived Waste Toxicity, IAEATECDOC-1349, IAEA, Vienna.
   Google Scholar
• Iwasa H, Han J, Ishikawa F. 2003. Mitogen-activated protein kinase p38 defines the common senescence-signaling pathway. Genes Cells. 8(2):131–144.
   PubMed Web of Science ®Google Scholar
• Jacobi W, Eisfeld K. 1980. Dose to tissues and effective dose equivalent by inhalation of radon-222, radon-220 and their short-lived daughters. Neuherberg: GesellschaftfuerStrahlen-und Umweltforschun gmbH Muenchen.
   Google Scholar
• Jayalekshmi P, Gangadharan P, Binu VS, Nair RRK, Nair MK, Rajan B, Akiba S. 2005. What did we learn from epidemiological studies in high background radiation area in India?. Intel Cong Series. 1276:102–105.
   Google Scholar
• Jostes RF. 1996. Genetic, cytogenetic, and carcinogenic effects of radon: a review. Mutat Res/Rev Genet Toxicol. 340(2–3):125–139.
   PubMed Web of Science ®Google Scholar
• Kanse SD, Sahoo BK, Gaware JJ, Prajith R, Sapra BK. 2016. A study of thoron exhalation from monazite-rich beach sands of High Background Radiation Areas of Kerala and Odisha. Environ Earth Sci. 75(23):1465.
   Web of Science ®Google Scholar
• Kelly FJ, Fussell JC. 2012. Size, source and chemical composition as determinants of toxicity attributable to ambient particulate matter. Atmos Environ. 60:504–526.
   Web of Science ®Google Scholar
• Kendall GM, Fell TP, Harrison JD. 2009. Dose to red bone marrow of infants, children and adults from radiation of natural origin. J Radiol Prot. 29(2):123–138.
   PubMed Web of Science ®Google Scholar
• Kobashi Y, Kataoka T, Kanzaki N, Ishida T, Sakoda A, Tanaka H, Ishimori Y, Mitsunobu F, Yamaoka K. 2020. Comparison of antioxidative effects between radon and thoron inhalation in mouse organs. Radiat Environ Biophys. 59(3):473–482.
   PubMed Web of Science ®Google Scholar
• Krewski D, Lubin JH, Zielinski JM, Alavanja M, Catalan VS, Field RW, Klotz JB, L??Tourneau EG, Lynch CF, Lyon JI, et al. 2005. A combined analysis of North American case-control studies of residential 222Rn and lung cancer. Epidemiology. 16(2):137–154.
   PubMed Web of Science ®Google Scholar
• Lee J-H, Bhang DH, Beede A, Huang TL, Stripp BR, Bloch KD, Wagers AJ, Tseng Y-H, Ryeom S, Kim CF, et al. 2014. Lung stem cell differentiation in mice directed by endothelial cells via a BMP4-NFATc1-thrombospondin-1 axis. Cell. 156(3):440–455.
   PubMed Web of Science ®Google Scholar
• Li Y, Schery SD, Turk B. 1992. Soil as a source of indoor 220Rn. Health Phys. 62(5):453–457.
   PubMed Web of Science ®Google Scholar
• Malakhov SG, Bakulin VN, Dmitrieva GV, Kirichenko LV, Ssissigina TI, Starikov BG. 1966. Diurnal variations of radon and thoron decay product concentrations in the surface layer of the atmosphere and their washout by precipitations. Tellus. 18(2–3):643–654.
   Web of Science ®Google Scholar
• Marino E, Caruso M, Campagna D, Polosa R. 2015. Impact of air quality on lung health: myth or reality? Ther Adv Chronic Dis. 6(5):286–298.
   PubMed Web of Science ®Google Scholar
• Martonen TB, Hofmann W. 1986. Factors to be considered in a dosimetry model for risk assessment of inhaled particles. Radiat Prot Dosim. 15:225–232.
   Web of Science ®Google Scholar
• Madas BG, Balásházy I. 2011. Mutation induction by inhaled radon progeny modeled at the tissue level. Radiat Environ Biophys. 50(4):553.
   Google Scholar
• McCormack V, Peto J, Byrnes G, Straif K, Boffetta P. 2013. Reply: comment on ‘Estimating the asbestos-related lung cancer burden from mesothelioma mortality. Br J Cancer. 109(3):825–826.
   PubMed Web of Science ®Google Scholar
• Meisenberg O, Tschiersch J. 2011. Thoron in indoor air: modeling for a better exposure estimate. Indoor Air. 21(3):240–252.
   PubMed Web of Science ®Google Scholar
• Menon A, Indu R, Chacko T, Nair CK. 2014. Low-dose ionising radiation effects: effects of thoron inhalation. IJLR. 9(4):252–265.
   Google Scholar
• Mishra R, Mayya YS. 2008. Study of a deposition-based direct thoron progeny sensor (DTPS) technique for estimating equilibrium equivalent thoron concentration (EETC) in the indoor environment. Radiat Meas. 43(8):1408–1416.
   Web of Science ®Google Scholar
• Mu Llerova M, Kozak K, Kovacs T, Csordas A, Grzadziel D, Holy K, Mazur J, Moravcsik A, Neznal M, Neznal M, et al. 2014. Preliminary results of indoor radon survey in V4 countries. Radiation Prot Dosimetry. 160(1–3):210–213.
   PubMed Web of Science ®Google Scholar
• Mubarak F, Fayez-Hassan M, Mansour NA, Ahmed TS, Ali A. 2017. Radiological investigation of high background radiation areas. Sci Rep. 7(1):1–2.
   PubMedGoogle Scholar
• Nair RR, Rajan B, Akiba S, Jayalekshmi P, Nair MK, Gangadharan P, Koga T, Morishima H, Nakamura S, Sugahara T. 2009. Background radiation and cancer incidence in Kerala, India-Karanagappally cohort study. Health Phys. 96(1):55–66.
   PubMed Web of Science ®Google Scholar
• National Research Council (US) Panel on Dosimetric Assumptions Affecting the Application of Radon Risk Estimates. 1991.Chapter 7: breathing, deposition, and clearance. In: Richard EM, editor. Comparative dosimetry of radon in mines and homes. Washington (DC): National Academies Press.
   Google Scholar
• [NCRP] National Council on Radiation Protection and Measurements 1988. Measurements in radon and radon daughters in air. NCRP Report 97. Bethesda (MD): NCRP Publications.
   Google Scholar
• NCRP. 1989. Guidance on radiation received in space activities. NCRP Report 98. Bethesda (MD): NCRP Publications;
   Google Scholar
• Norbury CJ, Hickson ID. 2001. Cellular responses to DNA damage. Annu Rev Pharmacol Toxicol. 41:367–401.
   PubMed Web of Science ®Google Scholar
• Okayasu R. 2012. Repair of DNA damage induced by accelerated heavy ions—a mini review. Int J Cancer. 130(5):991–1000.
   PubMed Web of Science ®Google Scholar
• Paulin L, Hansel N. 2016. Particulate air pollution and impaired lung function. F1000Res. 5:201.
   Google Scholar
• Porstendorfer J, Mercer TT. 1979. Influence of electric charge and humidity upon the diffusion coefficient of radon decay products. Health Phys. 37(2):191–199.
   PubMed Web of Science ®Google Scholar
• Porstendörfer J. 1994. Properties and behaviour of radon and thoron and their decay products in the air. J Aerosol Sci. 25(2):219–263.
   Web of Science ®Google Scholar
• Prasad M, Rawat M, Dangwal A, Prasad G, Mishra R, Ramola RC. 2016. Study of radiation exposure due to radon, thoron and progeny in the indoor environment of Yamuna and tons valleys of Garhwal, Himalaya. Radiat Prot Dosimetry. 171(2):187–191.
   PubMed Web of Science ®Google Scholar
• Radhakrishna AP, Somashekarappa HM, Narayana Y, Siddappa K. 1993. A new natural background radiation area on the southwest coast of India. Health Phys. 65(4):390–395.
   PubMed Web of Science ®Google Scholar
• Rafii S, Cao Z, Lis R, Siempos II, Chavez D, Shido K, Rabbany SY, Ding B-S. 2015. Platelet-derived SDF-1 primes the pulmonary capillary vascular niche to drive lung alveolar regeneration. Nat Cell Biol. 17(2):123–136.
   PubMed Web of Science ®Google Scholar
• Ramachandran TV. 2010. Environmental thoron (220Rn): a review. Iran J Radiat Res. 8(3):129–147.
   Google Scholar
• Ramola RC, Gusain GS, Rautela BS, Sagar DV, Prasad G, Shahoo SK, Ishikawa T, Omori Y, Janik M, Sorimachi A, et al. 2012. Levels of thoron and progeny in high background radiation area of the southeastern coast of Odisha, India. Radiat Prot Dosimetry. 152(1–3):62–65.
   PubMed Web of Science ®Google Scholar
• Ramola RC, Prasad G, Gusain GS, Rautela BS, Choubey VM, Sagar DV, Tokonami S, Sorimachi A, Sahoo SK, Janik M, et al. 2010. Preliminary indoor thoron measurements in high radiation background area of southeastern coastal Orissa, India. Radiat Prot Dosimetry. 141(4):379–382.
   PubMed Web of Science ®Google Scholar
• Rubin P, Casarett G. 2014. Biocontinuum of the pathophysiology paradigm. In: ALERT-Adverse late effects of cancer treatment. (Hrsg) general concepts and scientific precepts, Bd. 1. Berlin: Springer; p. S9–26
   Google Scholar
• Santos JJ, Conceição H, Leandro MV, Rosa MD. 2018. Formation of monazite-(Ce, La) by fluid-apatite interaction: the Floresta Azul Alkaline Complex, Bahia, Brazil. Braz J Geol. 48(4):721–733.
   Web of Science ®Google Scholar
• Seideman JH, Stancevic B, Rotolo JA, McDevitt MR, Howell RW, Kolesnick RN, Scheinberg DA. 2011. Alpha particles induce apoptosis through the sphingomyelin pathway. Radiat Res. 176(4):434–446.
   PubMed Web of Science ®Google Scholar
• Shetty PK, Narayana Y. 2010. Variation of radiation level and radionuclide enrichment in high background area. J Environ Radioact. 101(12):1043–1047.
   PubMed Web of Science ®Google Scholar
• Shiroma Y, Kina S, Fujitani T, Hosoda M, Sorimachi A, Ishikawa T, Sahoo SK, Tokonami S, Furukawa M. 2012. Characteristics of radon and thoron exhalation rates in Okinawa, a subtropical region of Japan. Radiat Prot Dosimetry. 152(1-3):184–188.
   PubMed Web of Science ®Google Scholar
• Sohrabi M. 1990. Recent radiological studies of highlevel natural radiation areas of Ramsar. Proceeding of International Conference on High Levels of Natural Radiation, Ramsar, Iran. Vienna: IAEA.
   Google Scholar
• Steinhausler F. 1996. Environmental 220Rn: a review. Environ Int. 22(Suppl. 1):1111–1123.
   Google Scholar
• Tadokoro T, Wang Y, Barak LS, Bai Y, Randell SH, Hogan BL. 2014. IL-6/STAT3 promotes regeneration of airway ciliated cells from basal stem cells. Proc Natl Acad Sci USA. 111(35):E3641–E3649.
   PubMed Web of Science ®Google Scholar
• Tao Z, Zha Y, Akiba S, Sun Q, Zou J, Li J, Liu Y, Kato H, Sugahara T, Wei L. 2000. Cancer mortality in the high background radiation areas of Yangjiang, China during the period between 1979 and 1995. JRR. 41(Suppl):31–41.
   PubMedGoogle Scholar
• Tavernier S. 2009. Interactions of particles in matter. In: Tavernier S, editor. Experimental techniques in nuclear and particle physics. Berlin, Heidelberg; Springer; p. 23–53.
   Google Scholar
• Tokonami S, Sun Q, Akiba S, Zhuo W, Furukawa M, Ishikawa T, Hou C, Zhang S, Narazaki Y, Ohji B, et al. 2004. Radon and thoron exposures for cave residents in Shanxi and Shaanxi provinces. Radiat Res. 162:390–396.
   Google Scholar
• Tu KW, Knutson EO, George AC. 1994. Thoron versus radon: comparison of measured progeny aerosol size distributions. Aerosol Sci Technol. 20(3):266–274.
   Web of Science ®Google Scholar
• United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR). 1993. Forty-second session of UNSCEAR. A/AC.82/R.526 United Nations, New York.
   Google Scholar
• UNSCEAR. 2000. UNSCEAR Report 2000, Sources and effects of ionizing radiation, Vol. I Sources, Annex B, Exposures from natural radiation sources. United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR), United Nations.
   Google Scholar
• United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR). (2008). Effects of ionizing radiation. UNSCEAR 2006 report to the general assembly, with scientific annexes United Nations, New York.
   Google Scholar
• Upadhyay S, Ganguly K, Stoeger T. 2014. Inhaled ambient particulate matter and lung health burden. Eur Med J Respir. 2:88–95.
   Google Scholar
• Vasconcelos DC, Oliveira AH, Silva MR, Penna R, Santos TO, Pereira C, Rocha Z, Menezes MÂ. 2009. Natural radioactivity in extreme south of Bahia, Brazil, using gamma-ray spectrometry.
   Google Scholar
• Verheij M, Bartelink H. 2000. Radiation-induced apoptosis. Cell Tissue Res. 301(1):133–142.
   PubMed Web of Science ®Google Scholar
• Vogel C, Hager C, Bastians H. 2007. Mechanisms of mitotic cell death induced by chemotherapy-mediated G2 checkpoint abrogation. Cancer Res. 67(1):339–345.
   PubMed Web of Science ®Google Scholar
• Wiegand J, Feige S, Quingling X, Schreiber U, Wieditz K, Wittmann C, Xiarong L. 2000. Radon and thoron in cave dwellings (Yan'an, China). Health Phys. 78(4):438–444.
   PubMed Web of Science ®Google Scholar
• Zha YR, Tao ZF, Wei LX. 1996. Epidemiological survey in a high background radiation area in Yangjiang, China. Zhonghua Liu Xing Bing Xue. 17(6):328–332.
   PubMedGoogle Scholar
• Zhukovsky M, Vasyanovich M, Onishchenko A, Vasilyev A. 2019. Anomalously high unattached fraction of 220Rn decay products in the atmosphere of monazite storage facility. Appl Radiat Isot. 151:1–6.
   PubMed Web of Science ®Google Scholar