1. Asthma and increased bronchial responsiveness in elite athletes: Atopy and sport event as risk factors 
Ilkka J. Helenius, MDa, Heikki O. Tikkanen, MDb, Seppo Sarna, PhDc, Tari Haahtela, MD, PhDa 
Journal of Allergy and Clinical Immunology 
Volume 101, Issue 5, Pages (May 1998)
DOI: /S (98)
Copyright © 1998 Mosby, Inc. Terms and Conditions

2. Fig. 1
Individual time intervals from start of active competitive sports to physician-diagnosed asthma in athletes who had asthma diagnosed during their sports career. Diamonds, Start of active competitive sports; squares, time of physician-diagnosed asthma.
Journal of Allergy and Clinical Immunology  , DOI: ( /S (98) )
Copyright © 1998 Mosby, Inc. Terms and Conditions