References
- Andersson U, Bird A-G, Britton S, Palacios R. Humoral and cellular immunity in humans studied at the cell level to two years of age. Immunol Rev 1981; 57: 5–38
- Hesselvik L. Respiratory infections among children in day nurseries. Acta Paediatr Scand 1948; 74(Suppl.)1–103
- Strangert K. Respiratory illness in preschool children with different forms of day care. Pediatrics 1976; 57: 191–6
- Ståhlberg M-R. The influence of form of day-care on occurrence of acute respiratory tract infections among young children. Acta Paediatr Scand 1980; 282(Suppl.)1–87
- Doyle A B. Incidence of illness in early group and family day-care. Pediatrics 1976; 58: 607–13
- Anderson L J, Parker R A, Strikas R A, et al. Day-care center attendance and hospitalisation for lower respiratory tract illness. Pediatrics 1988; 82: 300–8
- Köhler L, Hoist H-E. Auditory screening of four-year-old children. Acta Paediatr Scand 1972; 61: 555–60
- Ingvarsson L, Lundgren K, Olofsson B, Wall S. Epidemiology of acute otitis media in children. Acta Otolaryngol (Stockh) 1982; 388(Suppl.)1–52
- Fiellau-Nikolajsen M. Tympanometry in 3-year-old children. ORL J Otorhinolaryngol Relat Spec 1979; 41: 193–205
- Sorensen C H, Holm-Jensen S. Middle ear effusions and risk factors. J Otolaryngol 1982; 11: 46–51
- Redmond S R, Pichichero M E. Hemofilus influenzae type b disease. An epidemiological study with special reference to day-care centers. JAMA 1984; 252: 2581–4
- Petersson C, Håkansson A. A prospective study of infectious morbidity and antibiotic consumption among children in different forms of municipal daycare. Scand J Infect Dis 1989; 21: 449–57
- Håkansson A. Health complaints and drug consumption during the first eighteen months of life. Fam Pract 1989; 6: 210–6
- Svensk läkemedelsstatistik 1986. Apoteks-bolaget, Stockholm 1986, In Swedish
- Gardner G, Frank A L, Taber L H. Effect of social and family factors on viral respiratory infection and illness in the first years of life. J Epidemiol Community Health 1984; 38: 42–8