RT Journal Article SR Electronic T1 Age is the most important clinical feature to help rule out cardiac syncope JF BMJ Evidence-Based Medicine JO BMJ EBM FD BMJ Publishing Group Ltd SP 186 OP 187 DO 10.1136/bmjebm-2019-111270 VO 25 IS 5 A1 Jack O'Sullivan YR 2020 UL http://ebm.bmj.com/content/25/5/186.abstract AB