1. University of Lille INSERM, CHU Lille, U1189 – ONCO‐THAI – Image Assisted Laser Therapy for Oncology F‐59000 Lille France
2. Department of Dermatology CHU Lille F‐59000 Lille France
3. University of Lille CHU Lille, EA 2694 – Santé Publique: Epidémiologie et Qualité des Soins Unité de Biostatistiques F‐59000 Lille France
4. Galderma International SAS F‐92927 La Défense France
5. Department of Dermatology and Allergology Klinikum Vest GmbH D‐45657 Recklinghausen Germany