1. Department of Dermatology; Hospital Infantil Universitario Niño Jesús; Madrid Spain
2. Department of Pathology; Hospital Infantil Universitario Niño Jesús; Madrid Spain
3. Department of Rheumatology; Hospital Infantil Universitario Niño Jesús; Madrid Spain
4. Department of Immunology; Hospital Clínic-Institut d'Investigacions Biomèdiques August Pi i Sunyer; Barcelona Spain