1. Charing Cross Hospital; West London Neurosciences Centre; Fulham Palace Road London UK W6 8RF
2. Universitatsmedizin Göttingen; Abteilung fur Innere Medizin 1; Göttingen Germany
3. University of Nottingham; c/o Cochrane Skin Group; King's Meadow Campus Lenton Lane Nottingham UK NG7 2NR
4. The Walton Centre NHS Foundation Trust; Lower Lane Fazakerley Liverpool UK L9 7LJ