1. Department of Dermatology; University Hospital Zurich; Zurich Switzerland
2. Department of Dermatology; University Hospital Lausanne; Lausanne Switzerland
3. Department of Dermatology; Inselspital; University Hospital Bern; University of Bern; Bern Switzerland
4. Department of Dermatology; University Hospital Basel; Basel Switzerland
5. Department of Dermatology; Kantonsspital St. Gallen; St. Gallen Switzerland
6. Department of Dermatology; Ospedale Regionale di Bellinzona e Valli; Bellinzona Switzerland
7. Department of Ophthalmology; University Hospital Basel; Basel Switzerland
8. Department of Dermatology; Lucerne Cantonal Hospital; Lucerne Switzerland
9. Department of Dermatology; University Hospital Geneva; Geneva Switzerland