[1] Univ Oxford, Sleep & Circadian Neurosci Inst, Nuffield Dept Clin Neurosci, Oxford, England
[2] Univ Manchester, NIH, Ctr Primary Care, Manchester, England
[3] Univ Manchester, Care Res Sch Primary Care Res, Manchester, England
[4] Univ Oxford, Nuffield Dept Primary Care Hlth Sci, Behav Med, Oxford, England
[5] Univ Manchester, Ctr Primary Care & Hlth Serv Res, Manchester, England
[6] GmbH, Leipzig, Germany
[7] Univ Lincoln, Sch Hlth & Social Care, Community & Hlth Res Unit, Ross Lucas Med Sci Bldg, Lincoln LN6 7TS, England