1. Department of Surgery; Rijnstate Hospital; 6800 TA Arnhem The Netherlands
2. Department of Dermatology and Occupational Dermatology; Rijnstate Hospital; 6800 TA Arnhem The Netherlands
3. Department of Dermatology; Leiden University Medical Centre; 2300 RC Leiden The Netherlands
4. Department of Dermatology; Langeland Huidkliniek; 2700 KJ Zoetermeer The Netherlands
5. Department of Dermatology; Rijnstate Hospital; 6800 TA Arnhem The Netherlands