RT Journal Article SR Electronic T1 Pneumomediastinum complicating granulomatous–lymphocytic interstitial lung disease in common variable immunodeficiency JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e235557 DO 10.1136/bcr-2020-235557 VO 13 IS 7 A1 Konstantinos Stefanidis A1 Vasileios Rafailidis A1 Ioasaf Karafotias A1 Sa Tran YR 2020 UL http://casereports.bmj.com/content/13/7/e235557.abstract AB