RT Journal Article SR Electronic T1 In response JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 351 OP 351 DO 10.7861/clinmedicine.8-3-351a VO 8 IS 3 A1 Isaac Chirwa YR 2008 UL http://www.rcpjournals.org/content/8/3/351.2.abstract AB