1. Department of Plastic, Reconstructive and Hand Surgery Amsterdam University Medical Center University of Amsterdam Meibergdreef 9 Amsterdam 1105AZ the Netherlands
2. Department of Dermatology Amsterdam Public Health Amsterdam University Medical Center University of Amsterdam Meibergdreef 9 Amsterdam 1105AZ the Netherlands
3. Department of Dermatology Erasmus MC University Medical Center Rotterdam Sophia Children’s Hospital Doctor Molewaterplein 40 Rotterdam 3015GD the Netherlands
4. Aix Marseille Univ INSERM, MMG Faculté de Médecine AMU 27 boulevard Jean Moulin Marseille 13005 France
5. Patient representative Naevus International the Netherlands