RT Journal Article SR Electronic T1 In response JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 416 OP 416 DO 10.7861/clinmedicine.7-4-416a VO 7 IS 4 A1 George Lewith YR 2007 UL http://www.rcpjournals.org/content/7/4/416.2.abstract AB