[1] Univ Liverpool, Dept Primary Care & Mental Hlth, Liverpool, England
[2] NIHR Appl Res Collaborat North West Coast, Liverpool, England
[3] Univ Bradford, Ctr Appl Dementia Studies, Bradford, England
[4] Alzheimers Soc, London, England
[5] Queen Mary Univ London, Wolfson Inst Populat Hlth, Ctr Psychiat & Mental Hlth, London, England
[6] Univ Liverpool, Liverpool, England