[1] Univ Bern, Inselspital, Univ Hosp Bern, Div Allergol,Clin Rheumatol & Clin Immunol Allerg, CH-3010 Bern, Switzerland
[2] Adverse Drug React Anal & Consulting ADR AC GmbH, Bern, Switzerland
[3] Pfizer Inc, Drug Safety Res & Dev, Groton, CT 06340 USA
[4] Univ Liverpool, Dept Pharmacol & Therapeut, Liverpool L69 3BX, Merseyside, England
[5] Univ Bern, Inselspital, Univ Hosp Bern, Div Internal Med, CH-3010 Bern, Switzerland
[6] Kantonsspital, Divison Dermatol Allergol, St Gallen, Switzerland