RT Journal Article SR Electronic T1 A surprising cause of polycythaemia JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 967 OP 968 DO 10.1136/thoraxjnl-2016-208610 VO 71 IS 10 A1 N E De Maeyer A1 S Van Lommel A1 T Devos A1 B Buyse A1 K Nackaerts YR 2016 UL http://thorax.bmj.com/content/71/10/967.abstract AB