1. Department of Dermatology; Hospital Virgen de las Nieves; Granada; Spain
2. Department of Pediatric Hematology and Oncology; Hospital Vall d 'Hebron; Barcelona; Spain
3. Biochemistry and Molecular Genetics Unit; Hospital Clínico; Universitat de Barcelona; Institut d'Investigacions Biomèdiques August Pi i Sunyer; Granada; Spain
4. Department of Dermatology; Hospital Clínico San Cecilio; Granada; Spain
5. Department of Pediatric Hematology and Oncology; Hospital Virgen de las Nieves; Barcelona; Spain
6. Department of Dermatology; Hospital Clínic; Universitat de Barcelona; Institut d'Investigacions Biomèdiques August Pi i Sunyer; Barcelona; Spain