1. Department of Medical Informatics and Clinical Epidemiology; Oregon Health & Science University; Portland Oregon USA
2. Department of Physiotherapy; Universidade Federal de Minas Gerais (UFMG); Belo Horizonte, Minas Gerais Brazil
3. Department of Public Health and Preventive Medicine; Oregon Health & Science University; Portland Oregon USA
4. Department of Emergency Medicine; Oregon Health & Science University; Portland Oregon USA
5. School of Public Health; Oregon Health & Science University and Portland State University; Portland Oregon USA
6. Cochrane Response; Cochrane; London UK
7. Neuroscience Research Australia; Sydney Australia
8. Department of Medical Informatics & Clinical Epidemiology; Oregon Health & Science University; Portland Oregon USA