Validation of a rhinitis symptom questionnaire (ISAAC core questions) in a population of Swiss school children visiting the school health services. SCARPOL team. Swiss Study on Childhood Allergy and Respiratory Symptom with respect to Air Pollution and Climate. International Study of Asthma and Allergies in Childhood. - Braun-Fahrländer,C.; Wüthrich,B.; Gassner,M.; Grize,L.; Sennhauser,F.H.; Varonier,H.S.; Vuille,J.C. (Pediatr Allergy Immunol, 1997)