1. Department of Dermatology; University Hospitals Birmingham NHS Foundation Trust; Mindelsohn Way Birmingham B15 2TH U.K.
2. Division of Infection and Immunity; Cardiff University, 3rd Floor Glamorgan House; University Hospital of Wales; Heath Park Cardiff CF14 4XW U.K.
3. Department of Dermatology; Oxford University Hospitals NHS Foundation Trust; Headington Oxford OX3 7LE U.K.