RT Journal Article SR Electronic T1 Urticaria, angio-oedema and anaphylaxis JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 20 OP 23 DO 10.7861/clinmedicine.2-1-20 VO 2 IS 1 A1 Clive E H Grattan YR 2002 UL http://www.rcpjournals.org/content/2/1/20.abstract AB