[1
]Dermatologische Klinik, UniversitätsSpital Zürich, Zürich, Switzerland
[2
]Department of Dermatology, Leiden University Medical Center, Leiden, the Netherlands
[3
]Department of Dermatology, Leiden University Medical Center, Leiden, the Netherlands3Department
of Dermatology, Roosevelt Kliniek, Leiden, the Netherlands
[4
]Epidemiology, Biostatistics, and Prevention Institute (EBPI), University of Zurich,
Zurich, Switzerland5Department of Internal Medicine and Nephrology, Klinik Hirslanden,
Zurich, Switzerland