About the Authors

Daniel Glass

bataille@doctors.org.uk

Affiliation Department of Twin Research and Genetic Epidemiology, Kings College London, St Thomas' Hospital Campus, London, United Kingdom

Marko Lens

Affiliation Department of Twin Research and Genetic Epidemiology, Kings College London, St Thomas' Hospital Campus, London, United Kingdom

Ramasamyiyer Swaminathan

Affiliation Department of Chemical Pathology, Guys and St Thomas' NHS Foundation Trust, London, United Kingdom

Tim D. Spector

Affiliation Department of Twin Research and Genetic Epidemiology, Kings College London, St Thomas' Hospital Campus, London, United Kingdom

Veronique Bataille

Affiliations Department of Twin Research and Genetic Epidemiology, Kings College London, St Thomas' Hospital Campus, London, United Kingdom, Dermatology Department, West Herts NHS Trust, Hemel Hempstead General Hospital, Herts, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TDS VB. Performed the experiments: RS. Analyzed the data: DG ML VB. Contributed reagents/materials/analysis tools: RS. Wrote the paper: DG ML RS TDS VB.