RT Journal Article SR Electronic T1 Tracheal squamous cell papilloma with an aberrant artery in the stalk JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 435 OP 435 DO 10.1136/thoraxjnl-2020-214519 VO 75 IS 5 A1 Yahua Li A1 Kewei Ren A1 Liqun Ye A1 Jianzhuang Ren A1 Xinwei Han YR 2020 UL http://thorax.bmj.com/content/75/5/435.abstract AB