[1] ST THOMAS HOSP,ST JOHNS DERMATOL CTR,CONTACT DERMATITIS CLIN,LONDON SE1 7EH,ENGLAND
[2] VRIJE UNIV AMSTERDAM,ACAD ZIEKENHUIS,DERMATOL POLIKLIN,1007 MB AMSTERDAM,NETHERLANDS
[3] UNIV HOSP LEUVEN,DEPT DERMATOL,CONTACT ALLERGY UNIT,B-3000 LOUVAIN,BELGIUM