[1] LINKOPING UNIV HOSP,DEPT PEDIAT,S-58185 LINKOPING,SWEDEN
[2] VIENNA UNIV,HAUTKLIN 1,DEPT DERMATOL 1,A-1010 VIENNA,AUSTRIA
[3] RIGSHOSP,ALLERGY UNIT TTA 7511,DK-2100 COPENHAGEN O,DENMARK
[4] UNIV FREIBURG,PAEDIAT CLIN,D-7800 FREIBURG,FED REP GER
[5] ZIEGLERSPITAL,DIV MED,BERN,SWITZERLAND
[6] GUYS HOSP,SCH MED,DEPT MED,LONDON SE1 9RT,ENGLAND