[1
]Department of Dermatology; Waterland Hospital; Purmerend The Netherlands
[2
]ZBC Multicare; Independent Treatment Centre for Dermatology; Hilversum The Netherlands
[3
]Department of Dermatology; Erasmus Medical Centre; Rotterdam The Netherlands
[4
]University of Wales Trinity St. David; Swansea; Wales United Kingdom
[5
]Department of Dermatology; Amsterdam Medical Centre; Amsterdam The Netherlands