1. The University of Manchester; School of Nursing, Midwifery and Social Work; Jean McFarlane Building Oxford Road Manchester UK M13 9PL
2. University of Manchester; NIHR School for Primary Care Research, Manchester Academic Health Science Centre, Institute of Population Health; Manchester UK M13 9PL
3. The University of Manchester; Health Sciences Primary Care Research Group; Williamson Building, 5th Floor Oxford Road Manchester Greater Manchester UK M13 9PL
4. University of Warwick; Clinical Sciences Research Institute; Coventry UK CV4 7AL