Declaration of interest
WEST
R.B. received additional support from the National Institute for Health Research (NIHR) Applied Research Collaboration South West Peninsula. M.B. received additional support from the NIHR Applied Research Collaboration East Midlands and is partly supported by NIHR Applied Research Collaboration West Midlands. R.B., V.P. and M.B. received an NIHR Policy Research Programme grant to examine the implementation of PARTNERS. R.B. is a member of the Health Technology Assessment Prioritisation Committee A. All remaining authors have no conflicts of interest to declare.