1. Institute of Human Genetics; University Medical Center Freiburg; Freiburg Germany
2. Centre de Reference des Genodermatoses; Hôpital Saint-Louis; Paris France
3. Institute of Pathology; University Hospital of Heidelberg; Heidelberg Germany
4. University Lyon 1, EA4169 and CNRS; Lyon France
5. Dermatology Service at Santa Casa de Misericórdia de Porto Alegre; Porto Alegre RS Brazil