1. School of Healthcare Sciences, College of Biomedical and Life Sciences; Cardiff University; Cardiff UK
2. School of Public Health; University College Cork; Cork Ireland
3. School of Nursing and Midwifery; University College Cork; Cork Ireland
4. Cochrane Children and Families Network, c/o Cochrane Pregnancy and Childbirth, Department of Women's and Children's Health; The University of Liverpool; Liverpool UK
5. School of Epidemiology and Public Health Alumna; University College Cork; Cork Ireland