Forced Expiratory Flow (FEF25-75%) as a Clinical Endpoint in Children and Adolescents with Symptomatic Asthma Receiving Tiotropium: A Post Hoc Analysis.
Szefler SJ, Goldstein S, Vogelberg C, Bensch GW, Given J, Jugovic B, Engel M, Moroni-Zentgraf PM, Sigmund R, Hamelmann EH. Forced Expiratory Flow (FEF25-75%) as a Clinical Endpoint in Children and Adolescents with Symptomatic Asthma Receiving Tiotropium: A Post Hoc Analysis. Pulm Ther. 2020 Dec; 6(2):151-158.