1. Tameside Hospital NHS Foundation Trust; Fountain Street Ashton-under-Lyne UK OL6 9RW
2. The University of Manchester; School of Nursing, Midwifery and Social Work; Jean McFarlane Building Oxford Road Manchester UK M13 9PL
3. The University of Liverpool; Cochrane Pregnancy and Childbirth Group, Department of Women's and Children's Health; First Floor, Liverpool Women's NHS Foundation Trust Crown Street Liverpool UK L8 7SS