RT Journal Article SR Electronic T1 General practitioners with special clinical interests JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 515 OP 515 DO 10.7861/clinmedicine.1-6-515a VO 1 IS 6 A1 Clive Walker YR 2001 UL http://www.rcpjournals.org/content/1/6/515.2.abstract AB