RT Journal Article SR Electronic T1 Exhale airway bypass stents for emphysema JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 638 OP 638 DO 10.1136/thoraxjnl-2011-201372 VO 67 IS 7 A1 Zoumot, Zaid YR 2012 UL http://thorax.bmj.com/content/67/7/638.abstract AB