1. Universidade Federal de São Paulo; Brazilian Cochrane Centre; Rua Pedro de Toledo, 598 São Paulo Brazil 04039-001
2. Universidade Federal de São Paulo; Department of Dermatology; Rua Borges Lagoa, 508 São Paulo Brazil 04038-000
3. Universidade Federal de São Paulo; Emergency Medicine and Evidence Based Medicine; Rua Pedro de Toledo 598 São Paulo São Paulo Brazil 04039-001
4. University of Newcastle; Discipline of General Practice; Newbolds Buiding, University of Newcastle, University Drive Callaghan Australia 2308