RT Journal Article SR Electronic T1 Response JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP e426 OP e427 DO 10.7861/clinmed.Let.21.4.2 VO 21 IS 4 A1 Robert W Foley YR 2021 UL http://www.rcpjournals.org/content/21/4/e426.2.abstract