1. Cystic fibrosis;Davis;Am J Respir Crit Care Med.,1996
2. Cystic Fibrosis Foundation. Cystic Fibrosis Foundation Patient Registry Annual Data Report 2012
3. Subjective and objective means of assessing cystic fibrosis and asthma;Konig;Ann Allergy.,1982
4. A reduction on maximum mid-expiratory flow rate. a spirographic manifestation of small airway disease;McFadden;Am J Med.,1972
5. NIH Expert panel Report 2 Bethesda, MD US Department of Health and Human Services; National Institutes of Health; National Heart, Lung, and Blood Institutes; National Asthma Education and Prevention Program