The development of respiratory symptoms in a cohort of Kent schoolchildren.

Adolescent Asthma/epidemiology Body Height Body Weight Bronchitis/complications,epidemiology Child Child, Preschool Cough/epidemiology England Humans Hypothermia/complications Medical History Taking Pneumonia/epidemiology Residence Characteristics Respiratory Function Tests Respiratory Tract Diseases/epidemiology Risk Social Environment Statistics as Topic Surveys and Questionnaires