1. Department of Dermatology; University of Minnesota Medical School; Minneapolis MN USA
2. Department of Dermatology; Lothian University Hospitals NHS Trust, Lauriston Building; Edinburgh UK
3. Division of Dermatology, Department of Medicine; The Ottawa Hospital and the University of Ottawa; Ottawa Canada
4. Department of Emergency Medicine; The Ottawa Hospital; Ottawa Canada
5. Division of Dermatology; University of Toronto; Toronto Canada
6. Florida Dermatology and Skin Cancer Centers; Lake Wales Florida USA
7. Clinical Epidemiology Program; Ottawa Hospital Research Institute; Ottawa Canada
8. Department of Dermatology; University of Virginia Health System; Charlottesville USA
9. Musculoskeletal, Oral, Skin and Sensory Network; Oxford University Hospitals NHS Foundation Trust Second Floor, OUH Cowley Unipart House Business Centre; Oxford UK
10. Cochrane Children and Families Network, c/o Cochrane Pregnancy and Childbirth, Department of Women's and Children's Health; The University of Liverpool; Liverpool UK
11. Ottawa Hospital Research Institute, The Ottawa Hospital - General Campus; Ottawa Canada