[1] Univ Edinburgh, Sch Hlth Social Sci, Dept Clin & Hlth Psychol, Edinburgh, Scotland
[2] Greater Manchester Mental Hlth NHS Fdn Trust, Manchester, England
[3] NHS Lothian, Edinburgh, Scotland
[4] Univ Manchester, Sch Hlth Sci, Div Psychol & Mental Hlth, Fac Biol Med & Hlth,Manchester Acad Hlth Sci, Manchester, England
[5] Pennine Care NHS Fdn Trust, Ashton Under Lyne, England
[6] Marie Collins Fdn, Manchester, England