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Efficacy predictors of lung volume reduction with Zephyr valves in a European cohort.
Herth FJ, Noppen M, Valipour A, Leroy S, Vergnon JM, Ficker JH, Egan JJ, Gasparini S, Agusti C, Holmes-Higgin D, Ernst A; International VENT Study Group. Herth FJ, et al. Eur Respir J. 2012 Jun;39(6):1334-42. doi: 10.1183/09031936.00161611. Epub 2012 Jan 26. Eur Respir J. 2012. PMID: 22282552 Free article. Clinical Trial.