1. Health Services Research and Development Service, Veterans Health Administration, US Department of Veterans Affairs; Washington DC USA
2. Department of Psychiatry; University of Michigan Medical School; Ann Arbor MI USA
3. Department of Behavioral Health Services and Policy Research; New York State Psychiatric Institute; New York NY USA
4. RAND Europe; Cambridge UK
5. Royal National Orthopaedic Hospital; Stanmore UK
6. Department of Psychiatry and Irving Institute for Clinical and Translational Research; Columbia University and New York-Presbyterian Hospital; New York NY USA