1. Department of Dermatology CHU Nice Université Côte d'Azur CHU Nice 151, route de Ginestière 06200 Nice France
2. C3M, INSERM U1065 Université Côte d'Azur 151, route de Ginestière 06200 Nice France
3. Laboratory of Clinical and Experimental Endocrinology, Department of Chronic Diseases Metabolism and Ageing KU Leuven, Gasthuisberg 3000 Leuven Belgium
4. Callender Dermatology & Cosmetic Center 12200 Annapolis Road, Suite 315 Glenn Dale MD 20769 U.S.A
5. Federal University of Rio Grande do Sul, Hospital de Clinicas de Porto Alegre Ramiro Barcellos 2350 zone 13 Porto Alegre RS 90035‐903Brazil
6. Department of Clinical Social Medicine University of Heidelberg Voßstr. 2 69115 Heidelberg Germany
7. Cancer and Population Studies Group QIMR Berghofer Medical Research Institute Brisbane QLD 4006 Australia
8. CRUK Manchester Institute and Faculty of Biology, Medicine and Health University of Manchester Manchester Academic Health Sciences Centre Manchester M13 9NQU.K
9. School of Exercise and Nutrition Science Queensland University of Technology Brisbane QLD 4059Australia
10. L'Oréal R&I, Scientific Directorate 9 rue Pierre Dreyfus 92110 Clichy France
11. Faculty of Medicine, Pharmacy and Odontology University Cheikh Anta Diop of Dakar BP 5825 DakarSenegal
12. L'Oréal R&I 1 Avenue Eugène Schueller 93600 Aulnay‐sous‐bois France
13. Department of Anthropology The Pennsylvania State University 409 Carpenter Building University Park PA 16802U.S.A
14. St John's Institute of Dermatology King's College London London SE1 9RT U.K