1 Department of Dermatology, University of Münster, Münster, Germany.
2 Department of Oncology and Metabolism, University of Sheffield, Sheffield, UK.
3 Department of Dermatology and Netherlands Institute for Pigment Disorders, Amsterdam UMC, Amsterdam Institute for Infection and Immunity, University of Amsterdam, Amsterdam, The Netherlands.
4 Clinic of Neurology with Institute for Translational Neurology, University of Münster, Münster, Germany.