1. Tommy's Stillbirth Research Centre, Division of Developmental Biology and Medicine, School of Medical Sciences, Faculty of Biology, Medicine and Health University of Manchester Manchester UK
2. Health Research Board Trials Methodology Research Network, School of Nursing and Midwifery University of Galway Galway Ireland
3. Division of Nursing, Midwifery and Social Work, School of Health Sciences, Faculty of Biology, Medicine and Health Manchester Academic Science Centre, University of Manchester Manchester UK
4. Department of Obstetrics and Gynaecology University Medical Centre Groningen, University of Groningen Groningen the Netherlands
5. School of Nursing & Midwifery, Trinity College Dublin The University of Dublin Dublin Ireland
6. Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health University of Manchester Manchester UK