1. Resident, Department of Dermatology, Groningen University Hospital, Hanzeplein 1, 9700 RB Groningen, Netherlands, FAX 31-503612624
2. Resident, Department of Otorhinolaryngology, Groningen University Hospital
3. Pharmacy Student, Department of Pharmacy, Groningen University Hospital
4. Pharmacist, Department of Pharmacy, Groningen University Hospital
5. Staff Physician, Department of Dermatology, Groningen University Hospital
6. Clinical and Forensic Toxicologist/Pharmacologist, Department of Pharmacy, Groningen University Hospital