References
- Abbott W GH, Tasman-Jones C. Incidence of acquired primary hypolactasia in three New Zealand racial groups. NZ Med J 1985; 98: 228–9
- Andersson H, Dahlqvist A, Dotevall G, Walan A. Laktosintorelans och tarmbesvär hos vuxna. Lakartidningen 1970; 67: 517–24
- Anh N T, Thuc T K, Welsh J D. Lactose malabsorption in adult Vietnamese. Am J Clin Nutr 1977; 30: 468–9
- Arnhold R G, Perman J A, Nurse G T. Persistent high intestinal lactase activity in Papua New Guinea. The breath hydrogen test in a Sepik population. Ann Hum Biol 1981; 8: 481–4
- Arnold J, Diop M, Kodjovi M, Rozier J. L'intolérance au lactose chez l'adulte au Sénégal. CR Soc Biol 1980; 174: 983–93
- Arola H, Koivula T, Jokela H, Isokoski M. Simple urinary test for lactose malabsorption. Lancet 1982; 2: 524–5
- Bank Y W, Ann G S. Lactose intolerance in the Koreans. Mod Med Asia 1977; 13(3)7–8
- Bayless T M, Rothfeld B, Massa C, Wise L, Paige D, Bedine M S. Lactose and milk intolerance: clinical implications. N Engl J Med 1975; 292: 1156–9
- Bayoumi R AL, Flatz S D, Kühnau W, Flatz G. Beja and Nilotes: nomadic pastoralist groups in the Sudan with opposite distributions of the adult lactase phenotypes. Am J Phys Anthropol 1982; 58: 173–8
- Bayoumi R AL, Saha N, Salih A S, Bakkar A E, Flatz G. Distribution of the lactase phenotypes in the population of the Democratic Republic of the Sudan. Hum Genet 1981; 58: 279–81
- Berg N O, Dahlqvist A, Lindberg T, Meeuwisse G, Nordén Å, Åkerman M. Tunntarmsbiopsi som bidrag till diagnostiken av gastrointestinala rubbningar. Lakartidningen 1967; 64: 4266–77
- Bolin T D, Davis A E. Primary lactase deficiency: genetic or acquired?. Am J Dig Dis 1970; 15: 679–92
- Bolin T D, Davis A E, Seah C S, et al. Lactose intolerance in Singapore. Gastroenterology 1970; 59: 76–84
- Bolin T D, Morrison R M, Steel J E, Davis A E. Lactose intolerance in Australia. Med J Aust 1970; 4: 1289–92
- Bolin T D, Pirola R C, Davis A E. Adaptation of intestinal lactase in the rat. Gastroenterology 1969; 57: 406–9
- Burgio G R, Flatz G, Barbera C, et al. Prevalence of primary adult lactose malabsorption and awareness of milk intolerance in Italy. Am J Clin Nutr 1984; 39: 100–4
- Busk H E, Dahlerup B, Lytzen T, Juul-Jørgensen B, Gudmand-Høyer E. Hyppigheden af laktosemalabsorption blandt danske studenter. Ugeskr Laeger 1975; 137: 2062–4
- Cavalli-Sforza L L. Analytical review: some current problems of human population genetics. Am J Hum Genet 1973; 25: 82–104
- Cavalli-Sforza L T, Strata A, Barone A, Cucurachi L. Primary adult lactose malabsorption in Italy: regional differences in prevalence and relationship to lactose intolerance and milk consumption. Am J Clin Nutr 1987; 45: 748–54
- Chadwick J, Mann W N. The medical works of Hippocrates. A new translation from the original Greek made especially for English readers. Blackwell Scientific Publications, OxfordEngland 1950
- Chang N-H, Hsu H-Y, Chen C-J, Lee C-H, Hsu J-Y. Lactose malabsorption and small-intestinal lactase in normal Chinese children. J Pediatr Gastroenterol Nutr 1987; 6: 369–72
- Cook G C. Lactase activity in newborn and infant Baganda. Br Med J 1967; 1: 527–30
- Cook G C, Al-Torki M T. High intestinal lactase concentrations in adult Arabs in Saudi Arabia. Br Med J 1975; 3: 135–6
- Cuddenec Y, Delbrück H, Flatz G. Distribution of the adult lactase phenotypes—lactose absorber and malabsorber—in a group of 131 army recruits. Gastroenterol Clin Biol 1982; 6: 776–9
- Czeizel A, Flatz G, Flatz S D. Prevalence of primary adult lactose malabsorption in Hungary. Hum Genet 1983; 64: 398–401
- Dahlqvist A, Lindquist B. Lactose intolerance and protein malnutrition. Acta Paediatr Scand 1971; 60: 488–94
- Doxiadis S, Papageorgiadis G. Lactose intolerance in Greeks ‘letter’. Lancet 1973; 1: 271
- Eidsvoll B E, Schjønsby H. Hydrogenpusteprøven i diagnosen av primaer laktasemangel. Tidsskr Nor Laegeforen 1989; 109: 354–6
- Ellestad-Sayed J J, Haworth J C, Hildes J A. Disaccharide malabsorption and dietary patterns in two Canadian Eskimo communities. Am J Clin Nutr 1978; 31: 1473–8
- Elliott F G, Cox J, Nyoma B L. Intolerance au lactose chez l'adulte en Afrique centrale. Ann Soc Belg Med Trop 1973; 53: 113–32
- Fagan B M. People of the earth. An introduction to world prehistory5th ed. Little, Brown and Company, Boston 1986
- Ferguson A, MacDonald D M, Brydon W G. Prevalence of lactase deficiency in British adults. Gut 1984; 25: 163–7
- Ferguson A, Maxwell J D. Genetic aetiology of lactose intolerance. Lancet 1967; 2: 188–91
- Fielding J F, Harrington M G, Fottrell P F. The incidence of primary hypolactasia amongst native Irish. Irish J Med Sci 1981; 150: 276–7
- Flatz G. Gene dosage effect on lactase activity demonstrated in vivo. Am J Hum Genet 1984; 36: 306–10
- Flatz G. Genetics of lactose digestion in humans. Adv Hum Genet 1987; 16: 1–77
- Flatz G, Henze H-J, Palabiyikoglu E, Dagalp K, Tiirkkan T. Distribution of the adult lactase phenotypes in Turkey. Trop Geogr Med 1986; 38: 255–8
- Flatz G, Howell J N, Doench J, Flatz S D. Distribution of physiological adult lactase phenotypes, lactose absorber and malabsorber, in Germany. Hum Genet 1982; 62: 152–7
- Flatz G, Rotthauwe H W. Evidence against nutritional adaptation of tolerance to lactose. Humangenetik 1971; 13: 118–25
- Flatz G, Rotthauwe H W. Lactose nutrition and natural selection. Lancet 1973; 2: 76–7
- Flatz G, Rotthauwe H W. The human lactase polymorphism: Physiology and genetics of lactose absorption and malabsorption. Prog Med Genet 1977; 2: 205–49
- Flatz G, Saengudom C. Lactose tolerance in Asians: a family study. Nature 1969; 224: 915–6
- Flatz G, Schildge C, Sekou H. Distribution of adult lactase phenotypes in the Tuareg of Niger. Am J Hum Genet 1986; 38: 515–20
- Gilat T, Benaroya Y, Gelman-Malachi E, Adam A. Genetics of primary adult lactase deficiency. Gastroenterology 1973; 64: 562–8
- Gilat T, Malachi Gelman E, Shochet S B. Lactose tolerance in an Arab population. Am J Dig Dis 1971; 16: 203–6
- Gilat T, Russo S, Gelman-Malachi E, Aldor T AM. Lactase in man: a nonadaptable enzyme. Gastroenterology 1972; 62: 1125–7
- Green R M. A translation of Galen's hygiene (De sanitate tuenda). Charles C Thomas Publisher, Springfield, Ill. 1951
- Gudmand-Høyer E, Dahlqvist A, Jarnum S. Specific small-intestinal lactase deficiency in adults. Scand 3 Gastroenterol 1969; 4: 377–86
- Gudmand-Høyer E, MacNair A, Jarnum S, Broersma L, McNair J. Laktosemalabsorption i Vestgrønland. Ugeskr Laeger 1973; 135: 169–72
- Garcia Guix J, Gomez Rodrigo JM, Quereda Aparisi L, Desfiiis Serra MA, Garcia-Con de Gomez F J. Intolerancia a la lactosa en la poblacion espanola. Rev Esp Enferm Apar Dig 1974; 42: 367–82
- Heston L L, Gottesman I I. The evolution of lactose tolerance. Summary of the conference on lactase and milk intolerance, I I Gottesman, L L Heston. Office of Child Development, US Department of Health, Education and Welfare, Washington, DC 1973; 1–49
- Hijazi S S, Abulaban A, Ammarin Z, Flatz G. Distribution of adult lactase phenotypes in Bedouins and in urban and agricultural populations in Jordan. Trop Geogr Med 1983; 35: 157–61
- Ho M W, Povey S, Swallow D. Lactase polymorphism in adult British natives: estimating allele frequencies by enzyme assays in autopsy samples. Am J Hum Genet 1982; 34: 650–7
- Hussein L, Flatz S D, Kühnau W, Flatz G. Distribution of human adult lactase phenotypes in Egypt. Hum Hered 1982; 32: 94–9
- Isokoski M, Sahi T, Villako K, Tamm A. Epidemiology and genetics of lactose malabsorption. Ann Clin Res 1981; 13: 164–8
- Isokoski M, Tamm A, Sahi T, et al. Prevalence of lactose malabsorption among Finno-Ugric nations and cultural historical hypothesis ‘abstract’. Abstracts. The World Congresses of Gastroenterology, SydneyAustralia, August, 26–311990, PD 540
- Itkonen T T. Suomen lappalaiset vuoteen 1945. (The Lapps in Finland up to 1945). Werner Söderström Oy, Porvoo 1948, (in Finnish)
- Jackson R T, Latham M C. Lactose and milk intolerance in Tanzania. E Afr Med J 1978; 55: 298–302
- Jenkins T, Gibney S FA, Nurse G T, Penketh R JA. Persistent high intestinal lactase activity in Papua New Guinea. Lactose absorption curves in two populations. Ann Hum Biol 1981; 8: 447–51
- Jodry H, Griessen M, Courvoisier B, Fischer J. Incidence de la déficience en lactase chez les patientes atteintes d'osteoporose d'involution et chez les sujets normaux. Schweiz Med Wochenschr 1987; 117: 1736–41
- Johnson J D, Kretchmer N, Simoons F J. Lactose malabsorption: its biology and history. Adv Pediatr 1974; 21: 197–237
- Jussila J. Diagnosis of lactose malabsorption by the lactose tolerance test with peroral ethanol administration. Scand J Gastroenterol 1969; 4: 361–8
- Jussila J. Milk intolerance and lactose malabsorption in hospital patients and young servicemen in Finland. Ann Clin Res 1969; 1: 199–207
- Jussila J, Isokoski M, Launiala K. Prevalence of lactose malabsorption in a Finnish rural population. Scand J Gastroenterol 1970; 5: 49–56
- Kalibatiene D. Selective malabsorption of lactose among Lithuanians. thesis, University of Minsk, Minsk 1987, (in Russian)
- Kanaghinis T, Hatzioannou J, Deliargyris N, et al. Primary lactase deficiency in Greek adults. Am J Dig Dis 1974; 19: 1021–7
- Kassir Z, Kellow A H. Lactose intolerance in Iraq. J Fac Med Baghdad 1978; 20: 245–9
- Kattamis C, Anastassea-Vlachou K, Logothetis N, Siriopoulou V, Matsaniotis N. Lactose intolerance in Greeks. Lancet 1973; 1: 367–8
- Keusch G T, Troncale F J, Thavaramara B, Printyano P, Anderson P R, Bhamarapravathi N. Lactase deficiency in Thailand: effect of prolonged lactose feeding. Am J Clin Nutr 1969; 22: 638–41
- King F. Intolerance to lactose in mother's milk ‘letter’?. Lancet 1972; 2: 335
- Kretchmer N, Ransome-Kuti O, Hurwitz R, Dungy C, Alakija W. Intestinal absorption of lactose in Nigerian ethnic groups. Lancet 1971; 2: 392–5
- Kuusk I, Villako K. Results of lactose tolerance test in middle-and old age Estonians. Acta Comment Univ Tartu 1976; 385: 129–33, (in Russian)
- Labotkin K. Prevalence of selective lactose malabsorption in young Estonians and Russians. Acta Comment Univ Tartu 1987; 790: 65–7
- Lacassie Y, Winberg R, Monckeberg F. Poor predictability of lactose malabsorption from clinical symptoms for Chilean population. Am J Clin Nutr 1978; 31: 799–804
- Ladas S, Papanikos J, Arapakis G. Lactose malabsorption in Greek adults: correlation of small bowel transit time with the severity of lactose intolerance. Gut 1982; 23: 968–73
- Launiala K, Kuitunen P, Visakorpi J K. Disaccharidases and histology of duodenal mucosa in congenital lactose malabsorption. Acta Paediatr Scand 1966; 55: 257–63
- Lebenthal E, Antonowicz I, Shwachman H. Correlation of lactase activity, lactose tolerance and milk consumption in different age groups. Am J Clin Nutr 1975; 28: 595–600
- Leichter J. Lactose tolerance in a Slavic population. Am J Dig Dis 1972; 17: 73–6
- Lember M, Tamm A, Reimand K, Maaroos H-I. Milk sugar intolerance and selective lactose malabsorption in the ethnic group of Setu. Acta Comment Univ Tartu 1989; 854: 103–11, (in Russian)
- Lember M, Tamm A, Villako K. Lactose malabsorption in Estonians and Russians. Eur J Gastroenterol Hepatol 1991; 3: 479–81
- Lisker R, Aguilar L, Zavala C. Intestinal lactase deficiency and milk drinking capacity in the adult. Am J Clin Nutr 1978; 31: 1499–503
- Lisker R, Gonzalez B, Daltabuit M. Recessive inheritance of the adult type of intestinal lactase deficiency. Am J Hum Genet 1975; 227: 662–4
- Lisker R, Lopez-Habit G, Daltabuit M, Rostenberg I, Arroyo P. Lactase deficiency in a rural area of Mexico. Am J Clin Nutr 1974; 27: 756–9
- Madzarovova-Nohejlová J. Activitédes disaccharidases intestinales chez l'adulte et chez le buveur chronique de bière de Pilsen. Biol Gastroenterol 1971; 4: 325–32
- Madzarovová-Nohejlová J. Small bowel disaccharidase activity in Czech population and in Gipsy population living in west Bohemia ‘abstract’. Scand J Gastroenterol 1982; 17(Suppl 78)279
- Maggi R, Sayagues B, Fernandez A, et al. Lactose malabsorption and intolerance in Uruguayan population by breath hydrogen test (H2). J Pediatr Gastroenterol Nutr 1987; 6: 373–6
- McCracken R D. Adult lactose tolerance. JAMA 1970; 213: 2257–60
- McCracken R D. Lactase deficiency: an example of dietary evolution. Curr Anthropol 1971; 12: 479–517
- Metneki J, Czeizel A, Flatz S D, Flatz G. A study of lactose absorption capacity in twins. Hum Genet 1984; 67: 296–300
- Mičetić-Turk D. Prevalence of lactose malabsorption in children of Nord-East Slovenia ‘abstract’. Scand J Gastroenterol 1982; 17(Suppl 78)281
- Moens G JN, Brinkman J G, Hulsmann A R, Meijssen M AC, de Groot C J. Gestoorde lactoseresoptie bij Rotterdamse schoolkinderen uit verschillende etnische groepen. Ned Tijdschr Geneeskd 1987; 131: 1671–4
- Nasrallah S M. Lactose intolerance in the Lebanese population and in 'Mediterranean lymphoma'. Am J Clin Nutr 1979; 32: 1994–6
- Newcomer A D, Gordon H, Thomas P J, McGill D B. Family studies of lactase deficiency in the American Indian. Gastroenterology 1977; 73: 985–8
- Newcomer A D, McGill D B. Disaccharidase activity in the small intestine: prevalence of lactase deficiency in 100 healthy subjects. Gastroenterology 1967; 53: 881–9
- Newcomer A D, Thomas P H, McGill D B, Hofmann A F. Lactase deficiency: a common genetic trait of the American Indian. Gastroenterology 1977; 72: 234–7
- Nose O, Iida Y, Kai H, Harada T, Ogawa M, Yabuuchi H. Breath hydrogen test for detecting lactose malabsorption in infants and children. Arch Dis Child 1979; 53: 436–40
- O'Morain C, Loubiere M, Rampal P, Sudaka P, Delmont J. Etude comparative de l'insuffisance en lactase de deux populations adultes difterentes (55 Nicois et 55 Maghrebins). Acta Gastroenterol Belg 1978; 41: 56–63
- Paige D M, Leonardo E, Cordano A, Nakashima J, Adrianzen B, Graham G G. Lactose intolerance in Peruvian children: effect of age and early nutrition. Am J Clin Nutr 1972; 25: 297–301
- Pauwels S, Fiasse R, Tome G, Buts J P, Dive C. A simplified method of measuring breath hydrogen by end-expiratory sampling for diagnosis of lactose malabsorption. Acta Clin Belg 1985; 40: 174–8
- Yanez Pena A, Angulo Pena JF, Fernandez Juarez C. Mal-absorción de lactosa en estudiantes espanoles. I. Toleranzia intestinal a la sobrecarga oral de lactosa. Rev Esp Enferm Apar Dig 1971; 35: 925–38
- Poen H, ten Thije O J. Lactasedeficientie: symptoom of diagnose ‘abstract’?. Ned Tijdschr Geneeskd 1967; 111: 2205
- Pounds N JG. An historical geography of Europe. Cambridge University Press, Cambridge 1990
- Rab S M, Baseer A. High intestinal lactase concentrations in adult Pakistanis. Br Med J 1976; 1: 436–7
- Rahimi A G, Delbriick H, Haeckel R, Goedde H W, Flatz G. Persistence of high intestinal lactase activity (lactose tolerance) in Afghanistan. Hum Genet 1976; 34: 57–62
- Ransome-Kuti O, Kretchmer N, Johnson J, Gribble J T. Family studies of lactose intolerance in Nigerian ethnic groups ‘abstract’. Pediatr Res 1972; 6: 359
- Ransome-Kuti O, Kretchmer N, Johnson J D, Gribble J T. A genetic study of lactose digestion in Nigerian families. Gastroenterology 1975; 68: 431–6
- Rinaldi E, Albini L, Costagliola C, et al. High prevalence of lactose absorbers among adults with idiopathic senile and presenile cataract in a population with a high prevalence of primary adult lactose malabsorption. Lancet 1984; 1: 355–7
- Rosenkranz W, Hadorn B, Muller W, Heinz-Erian P, Hensen C, Flatz G. Distribution of human adult lactase phenotypes in the population of Austria. Hum Genet 1982; 62: 158–61
- Rosensweig N S. Adult lactase deficiency: genetic control or adaptive response?. Gastroenterology 1971; 60: 464–7
- Rosensweig N S, Herman R H. Control of jejunal sucrase and maltase activity by dietary sucrose or fructose in man: a model for the study of enzyme regulation in man. J Clin Invest 1968; 47: 2253–62
- Sahi T. Lactose malabsorption in Finnish-speaking and Swedish-speaking populations in Finland. Scand J Gastroenterol 1974; 9: 303–8
- Sahi T. The inheritance of selective adult-type lactose malabsorption. Scand J Gastroenterol 1974; 9(Suppl 30)1–73
- Sahi T. Intestinal lactase polymorphisms and dairy foods. Hum Genet 1978, Suppl 1: 115–23
- Sahi T. Dietary lactose and the aetiology of human small-intestinal hypolactasia. Gut 1978; 19: 1074–86
- Sahi T. Genetics and epidemiology of hypolactasia. The genetics and heterogeneity of common gastrointestinal disorders, J I Rotter, I M Samloff, D L Rimoin. Academic Press, New York 1980; 215–33
- Sahi T. Epidemiologic aspects of gastrointestinal diseases with special reference to hypolactasia in Skolt Lapps. Acta Comment Univ Tartu 1989; 854: 112–28
- Sahi T, Isokoski M, Jussila J, Launiala K. Lactose malabsorption in Finnish children of school age. Acta Pediatr Scand 1972; 61: 11–6
- Sahi T, Isokoski M, Jussila J, Launiala K, Pyorala K. Recessive inheritance of adult-type lactose malabsorption. Lancet 1973; 2: 823–6
- Sahi T, Launiala K. More evidence for the recessive inheritance of selective adult type lactose malabsorption. Gastroenterology 1977; 73: 231–2
- Sahi T, Launiala K. Manifestation and occurrence of selective adult-type lactose malabsorption in Finnish teenagers. A follow-up study. Am J Dig Dis 1978; 23: 699–704
- Sahi T, Launiala K, Laitinen H. Hypolactasia in a fixed cohort of young Finnish adults. A follow-up study. Scand J Gastroenterol 1983; 18: 865–70
- Sahi T, Villako K, Tamm A, et al. Lactose malabsorption among the populations of the Eastern coast of the Baltic Sea ‘abstract’. Gastroenterol Int 1988; 1(Suppl 2)266
- Scrimshaw N S, Murray E B. The acceptability of milk and milk products in populations with a high prevalence of lactose intolerance. Am J Clin Nutr 1988; 48: 1083–159, Suppl
- Senewiratne B, Thambipillai S, Perera H. Intestinal lactase deficiency in Ceylon (Sri Lanka). Gastroenterology 1977; 72: 1257–9
- Simoons F J. Primary adult lactose intolerance and the milking habit: a problem in biological and cultural interrelations. I. Review of the medical research. Am J Dig Dis 1969; 14: 819–36
- Simoons F J. Primary adult lactose intolerance and the milking habit: a problem in biologic and cultural interrelations. II. A culture historical hypothesis. Am J Dig Dis 1970; 15: 695–710
- Simoons F J. New light on ethnic differences in adult lactose intolerance. Am J Dig Dis 1973; 18: 595–611
- Simoons F J. The geographic hypothesis and lactose malabsorption. A weighing of the evidence. Am J Dig Dis 1978; 23: 963–80
- Simoons F J. Geographic patterns of primary adult lactose malabsorption: a further interpretation of evidence for the Old World. Lactose digestion: clinical and nutritional implications, D M Paige, T M Bayless. Johns Hopkins University Press, Baltimore 1981; 23–48
- Socha J, Ksiazyk J, Flatz G, Flatz S D. Prevalence of primary adult lactose malabsorption in Poland. Ann Hum Biol 1984; 11: 311–6
- Surjono A, Sebodo T, Soenarto J, Moenginah P A. Lactose intolerance among healthy adults. Paediatr Indones 1973; 13: 49–54
- Tamm A, Lember M, Siigur U, . Prevalence of lactose malabsorption (LM) in adult Mari population ‘abstract’. Abstracts, International Epidemiological Association, XI Scientific Meeting, T Klaukka, T Piha, K Poikolainen, T Sahi, et al. Helsinki 1987; 104
- Tammur R. Practical significance of selective hypolactasia in Estonians. Acta Comment Univ Tartu 1989; 854: 129–37
- Tamuleviciute D J, Kalibatiene D J. Prevalence of primary lactose malabsorption in adults. Klin Med (Mosk) 1987; 65(8)73–5, (in Russian)
- Valenkevich L N. Lactase activity and the syndrome of milk intolerance. Klin Med (Mosk) 1977; 55: 66–70, (in Russian)
- Valenkevich L N. Current problems of lactase deficiency. Vopr Pitan 1987; 4: 31–4, (in Russian)
- Valenkevich L N, Yakhontova O I. Lactase deficiency in the native population of the Mordovian and Karelian ASSR. Klin Med (Mosk) 1989; 67(7)56–8, (in Russian)
- Velebit L, Cochet B, Courvoisier B. Incidence de Fintolerance au lactose dans l'osteoporose postmenopausique. Schweiz Med Wochenschr 1978; 108: 2061–5
- Wang Y, Yan Y, Xu J, et al. Prevalence of primary adult lactose malabsorption in three populations in northern China. Hum Genet 1984; 67: 103–6
- Welsh J D. Isolated lactase deficiency in humans: report on 100 patients. Medicine 1970; 49: 257–77
- Welsh J D, Poley J R, Bhatia M, Stevenson D E. Intestinal disaccharidase activities in relation to age, race, and mucosal damage. Gastroenterology 1978; 75: 847–55
- Welsh J D, Rohrer V, Knudsen K B, Paustian F F. Isolated lactase deficiency. Correlation of laboratory studies and clinical data. Arch Intern Med 1967; 120: 261–9
- Welsh J D, Zschiesche D M, Willits V L, Russel L. Studies of lactose intolerance in families. Arch Intern Med 1968; 122: 315–7
- Wittenberg D A, Moosa A. Lactose maldigestion: increased age-related prevalence in institutionalized children. J Pediatr Gastroenterol Nutr 1990; 11: 489–95
- Woteki C E, Weser E, Young E A. Lactose malabsorption in Mexican-American children. Am J Clin Nutr 1976; 29: 19–24
- Woteki C E, Weser E, Young E A. Lactose malabsorption in Mexican-American adults. Am J Clin Nutr 1977; 30: 470–5
- Yao X H, Kong B Q, Yan J X, Zhu X C, Lu Y F. Lactose tolerance test by hydrogen breath method in Chinese. Chin Med J 1987; 100: 316–8
- Yoshida Y, Sasaki G, Goto S, Yanagiya S, Takashina K. Studies on the etiology of milk intolerance in Japanese adults. Gastroenterol Jap 1975; 10: 29–34
- Zheng J J, Gong Z L, Xue L S, Zhu X S, Luo J Y. Lactose malabsorption and its ethnic differences in Hans and Uygurs. Chin Med J 1988; 101: 284–6