1. Cardiff University School of Medicine; Division of Psychological Medicine and Clinical Neurosciences; Hadyn Ellis Building Maindy Road Cardiff UK CF24 4HQ
2. Cardiff & Vale, University Health Board; Veterans' NHS Wales; Global Link Dunleavy Drive Cardiff UK CF11 0SN
3. The University of Queensland; School of Medicine; Herston Road Herston Queensland Australia 4006
4. University of York; Cochrane Common Mental Disorders; Heslington York UK YO10 5DD