1. Department of Twin Research & Genetic EpidemiologyKing's College London London United Kingdom
2. Department of Medical Sciences, Section of DermatologyUniversity of Turin Turin Italy
3. Department of DermatologyLondon North West Healthcare NHS Trust Northwick Park Hospital London United Kingdom
4. Imperial College London London United Kingdom
5. Section of Epidemiology and BiostatisticsLICAP, University of Leeds Leeds United Kingdom
6. Department of DermatologyInstituto Valenciano De OncologıaValencia Spain
7. Department of DermatologyMelanoma Unit, Hospital Clinic & IDIBAPS, University of BarcelonaBarcelona Spain
8. Department of SurgeryMelanoma UnitHospital Clinic & IDIBAPS, University of BarcelonaBarcelona Spain
9. Department of Nuclear Medicine ServiceMelanoma Unit, Hospital Clinic & IDIBAPS, University of BarcelonaBarcelona Spain
10. Department of Pathology ServiceMelanoma Unit, Hospital Clinic & IDIBAPS, University of BarcelonaBarcelona Spain
11. Department of OncologyInstituto Valenciano De OncologıaValencia Spain
12. Department of PathologyInstituto Valenciano De OncologıaValencia Spain
13. Instituto de Salud Carlos IIICIBER on Rare DiseasesBarcelona Spain
14. Department of DermatologyWest Herts NHS TrustHertfordshire United Kingdom