1 Photobiology Unit, Dermatology Department, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom. Electronic address: Sanaa.butt@nhs.scot.
2 Photobiology Unit, Dermatology Department, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom.
3 Department of Dermatology, University Hospital Southampton National Health Service Foundation Trust, Southampton, Hampshire, UK.
4 Department of Photodermatology, St John's Institute of Dermatology, Guy's and St Thomas' National Health Service Foundation Trust, London, United Kingdom.