Several factors were not considered in study of increase in hay fever and eczema.
McClelland
V
V
Watson
E
E
Safar
M
M
D000293:Adolescent; D001364:Awareness; D015331:Cohort Studies; D004485:Eczema / Q000453:epidemiology*; D006801:Humans; D015995:Prevalence; D006255:Rhinitis, Allergic, Seasonal / Q000453:epidemiology*; D006113:United Kingdom / Q000453:epidemiology