Implementation of Bronchoscopic Lung Volume Reduction Using One-Way Endobronchial Valves: A Retrospective Single-Centre Cohort Study. - Posthuma R; Vaes AW; Walraven KHM; Sardari Nia P; Schreiber JU; Gietema HA; Wesseling G; Wouters EFM; Vanfleteren LEGW (Respiration; international review of thoracic diseases, 2022)