1. Okada H, Kuhn C, Feillet H, Bach JF. The ‘hy-giene hypothesis' for autoimmune and allergic diseases: an update. Clin Exp Immunol. 2010; 160:1–9.
Article
2. Hong SJ, Ahn KM, Lee SY, Kim KE. The prevalences of asthma and allergic diseases in Korean children. Korean J Pediatr. 2008; 51:343–50.
Article
3. Kwon JW, Kim BJ, Song Y, Seo JH, Kim TH, Yu J, et al. Changes in the prevalence of childhood asthma in seoul from 1995 to 2008 and its risk factors. Allergy Asthma Immunol Res. 2011; 3:27–33.
Article
4. Lee HB, Shin SA, Oh JW. New patterns of childhood asthma pevalence in six Asian countries: comparison of ISAAC phases I and III. Pediatr Allergy Respir Dis(Korea). 2008; 18:70–7.
5. Asher MI, Montefort S, Björkstén B, Lai CK, Strachan DP, Weiland SK, et al. Worldwide time trends in the prevalence of symptoms of asthma, allergic rhinoconjunctivitis, and eczema in childhood: ISAAC Phases One and Three repeat multicountry cross-sectional surveys. Lancet. 2006; 368:733–43.
Article
6. Lee SI, Shin MH, Lee HB, Lee JS, Son BK, Koh YY, et al. Prevalences of symptoms of asthma and other allergic diseases in Korean children: a nationwide questionnaire survey. J Korean Med Sci. 2001; 16:155–64.
Article
7. The International Study of Asthma and Allergies in Childhood (ISAAC) Steering Committee. Worldwide variation in prevalence of symptoms of asthma, allergic rhinoconjunctivi-tis, and atopic eczema: ISAAC. Lancet. 1998; 351:1225–32.
8. Asher MI, Weiland SK. The International Study of Asthma and Allergies in Childhood (ISAAC). ISAAC Steering Committee. Clin Exp Allergy. 1998; 28(Suppl 5):52–66.
9. Jee HM, Kim KW, Kim CS, Sohn MH, Shin DC, Kim KE. Prevalence of asthma, rhinitis and eczema in Korean children using the International Study of Asthma and Allergies in Childhood (ISAAC) questionnaires. Pediatr Allergy Respir Dis(Korea). 2009; 19:165–72.
10. Hong SJ, Kim SW, Oh JW, Rah YH, Ahn YM, Kim KE, et al. The validity of the ISAAC written questionnaire and the ISAAC video questionnaire (AVQ 3.0) for predicting asthma associated with bronchial hyperreactivity in a group of 13–14 year old Korean schoolchildren. J Korean Med Sci. 2003; 18:48–52.
11. Oh JW, Pyun BY, Choung JT, Ahn KM, Kim CH, Song SW, et al. Epidemiological change of atopic dermatitis and food allergy in school-aged children in Korea between 1995 and 2000. J Korean Med Sci. 2004; 19:716–23.
Article
12. Oh JW, Kim KE, Pyun BY, Lee HR, Choung JT, Hong SJ, et al. Nationwide study for epidemiological change of atopic dermatitis in school aged children between 1995 and 2000 and kindergarten aged children in 2003 in Korea. Pediatr Allergy Respir Dis(Korea). 2003; 13:227–37.
13. Lee YM, Hwang SW. Prevalence and risk factors for atopic dermatitis in pre-school and school aged children. J Korean Acad Child Health Nurs. 2008; 14:285–94.
14. Hwang SJ, Kim JH, Chung SH, Park DH, Shim JW, Kim DS, et al. Impact of environmental tobacco smoke exposure and home environment on asthma and wheeze in school children. Pediatr Allergy Respir Dis(Korea). 2010; 20:238–46.
15. Son KY, Park KS, Hwang HH, Yun BS, Lee SJ, Kim MA, et al. Prevalence of allergic diseases among primary school children in Ilsan, Gyeonggi and changes of symptoms after environmental control in 2005. Pediatr Allergy Respir Dis (Korea). 2007; 17:384–93.
16. Kim BS, Kim HB, Lee SY, Kim JH, Jin HS, Kim BJ, et al. Prevalence of allergic diseases in high school students in Korea. Korean J Asthma Allergy Clin Immunol. 2007; 27:168–75.
17. Kwon JW, Seo JH, Yu J, Kim BJ, Kim HB, Lee SY, et al. Relationship between the prevalence of allergic rhinitis and allergen sensitization in children of Songpa area, Seoul. Pediatr Allergy Respir Dis(Korea). 2011; 21:47–55.
Article
18. Oh SK, Seong HU, Lim DH, Kim JH, Son BK, Kim HC, et al. Relationship between air pollutants and prevalence of allergic disease/pulmo-nary function in students in Incheon. Pediatr Allergy Respir Dis(Korea). 2010; 20:264–76.
19. Nam SY, Yoon HS, Kim WK. Prevalence of allergic disease in kindergarten age children in Korea. Pediatr Allergy Respir Dis(Korea). 2005; 15:439–45.
20. Wahn U. What drives the allergic march? Allergy. 2000; 55:591–9.
Article
21. Martín Fernández-Mayoralas D, Martín Caballero JM, García-Marcos Alvarez L. Association between atopic dermatitis, allergic rhinitis and asthma in schoolchildren aged 13–14 years old. An Pediatr (Barc). 2004; 60:236–42.
22. Peroni DG, Piacentini GL, Alfonsi L, Zerman L, Di Blasi P, Visona' G, et al. Rhinitis in preschool children: prevalence, association with allergic diseases and risk factors. Clin Exp Allergy. 2003; 33:1349–54.
Article
23. Bousquet J, Vignola AM, Demoly P. Links between rhinitis and asthma. Allergy. 2003; 58:691–706.
Article
24. Koh YY, Kim CK. The development of asthma in patients with allergic rhinitis. Curr Opin Allergy Clin Immunol. 2003; 3:159–64.
Article
25. Togias A. Rhinitis and asthma: evidence for respiratory system integration. J Allergy Clin Immunol. 2003; 111:1171–83.
Article
26. Boulay ME, Boulet LP. The relationships between atopy, rhinitis and asthma: pathophysiological considerations. Curr Opin Allergy Clin Immunol. 2003; 3:51–5.
Article
27. Braunstahl GJ, Hellings PW. Allergic rhinitis and asthma: the link further unraveled. Curr Opin Pulm Med. 2003; 9:46–51.
Article
28. Arruda LK, SoléD , Baena-Cagnani CE, Nas-pitz CK. Risk factors for asthma and atopy. Curr Opin Allergy Clin Immunol. 2005; 5:153–9.
Article
29. Ciprandi G, Cirillo I, Vizzaccaro A, Milanese M, Tosca MA. Airway function and nasal inflammation in seasonal allergic rhinitis and asthma. Clin Exp Allergy. 2004; 34:891–6.
Article
30. Ramsey CD, Celedón JC. The hygiene hypothesis and asthma. Curr Opin Pulm Med. 2005; 11:14–20.
Article
31. Strachan DP. Family size, infection and atopy: the first decade of the "hygiene hypothesis". Thorax. 2000; 55(Suppl 1):S2–10.
Article
32. Cohet C, Cheng S, MacDonald C, Baker M, Foliaki S, Huntington N, et al. Infections, medication use, and the prevalence of symptoms of asthma, rhinitis, and eczema in childhood. J Epidemiol Community Health. 2004; 58:852–7.
Article
33. Newson RB, Shaheen SO, Chinn S, Burney PG. Paracetamol sales and atopic disease in children and adults: an ecological analysis. Eur Respir J. 2000; 16:817–23.
Article
34. McKeever TM, Lewis SA, Smith C, Collins J, Heatlie H, Frischer M, et al. Early exposure to infections and antibiotics and the incidence of allergic disease: a birth cohort study with the West Midlands General Practice Research Database. J Allergy Clin Immunol. 2002; 109:43–50.
Article
35. Kero J, Gissler M, Grönlund MM, Kero P, Koskinen P, Hemminki E, et al. Mode of delivery and asthma-is there a connection? Pediatr Res. 2002; 52:6–11.
36. Xu B, Pekkanen J, Hartikainen AL, Järvelin MR. Caesarean section and risk of asthma and allergy in adulthood. J Allergy Clin Immunol. 2001; 107:732–3.
Article
37. Grönlund MM, Lehtonen OP, Eerola E, Kero P. Fecal microflora in healthy infants born by different methods of delivery: permanent changes in intestinal flora after cesarean delivery. J Pediatr Gastroenterol Nutr. 1999; 28:19–25.
38. Eggesb⊘ M, Botten G, Stigum H, Nafstad P, Magnus P. Is delivery by cesarean section a risk factor for food allergy? J Allergy Clin Immunol. 2003; 112:420–6.
39. McKeever TM, Lewis SA, Smith C, Hubbard R. Mode of delivery and risk of developing allergic disease. J Allergy Clin Immunol. 2002; 109:800–2.
Article
40. Juhn YJ, Weaver A, Katusic S, Yunginger J. Mode of delivery at birth and development of asthma: a population-based cohort study. J Allergy Clin Immunol. 2005; 116:510–6.
Article
41. Werner A, Ramlau-Hansen CH, Jeppesen SK, Thulstrup AM, Olsen J. Caesarean delivery and risk of developing asthma in the offspring. Acta Paediatr. 2007; 96:595–6.
Article
42. Park YH, Kim KW, Choi BS, Jee HM, Sohn MH, Kim KE. Relationship between mode of delivery in childbirth and prevalence of allergic diseases in Korean children. Allergy Asthma Immunol Res. 2010; 2:28–33.
Article