RT Journal Article SR Electronic T1 Atrial fibrillation JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 90 OP 90 DO 10.7861/clinmedicine.19-1-90 VO 19 IS 1 A1 Kaushik Guha YR 2019 UL http://www.rcpjournals.org/content/19/1/90.1.abstract