[1] UNIV HOSP LEUVEN,DEPT DERMATOL,B-3000 LOUVAIN,BELGIUM
[2] KAROLINSKA HOSP,DEPT OCCUPAT DERMATOL,S-10401 STOCKHOLM 60,SWEDEN
[3] ST THOMAS HOSP,ST JOHNS DERMATOL CTR,CONTACT DERMATITIS CLIN,LONDON SE1 7EH,ENGLAND
[4] WYCOMBE GEN HOSP,DEPT DERMATOL,HIGH WYCOMBE HP11 2TT,BUCKS,ENGLAND