1. Department of Dermatology Hospital Universitario del Henares Madrid Spain
2. Department of Dermatology Hospital Universitario Miguel Servet Zaragoza Spain
3. Department of Pathology Hospital Universitario Puerta de Hierro‐Majadahonda Madrid Spain
4. Department of Biology Universidad Autónoma de Madrid Madrid Spain
5. Department of Medicine and Medical Specialties Instituto Ramón y Cajal de Investigaciones Sanitarias, Universidad de Alcalá Madrid Spain