1 Department of Dermatology, Hospital Universitario Príncipe de Asturias, Universidad de Alcalá, Madrid, Spain. Electronic address: elucia.pinto95@gmail.com.
2 Department of Dermatology, Hospital Universitario de Navarra, Pamplona, Spain.
3 Department of Dermatology, Hospital Universitario Puerta de Hierro, Madrid, Spain.