1. Department of Dermatology Hospital del Niño Jesús Madrid Spain
2. Departments of Medicine and Pediatrics Section of Dermatology The University of Chicago Medicine Chicago Illinois U.S.A
3. Department of Pathology Hospital del Niño Jesús Madrid Spain
4. Department of Dermatology University of California, San Francisco (UCSF) San Francisco California U.S.A
5. Department of Dermatology Fundación Jiménez Díaz Madrid Spain