Charlene Thornton (Flinders University Adelaide, school of Nursing and Midwifery), Lilian Peters (Midwifery Science, AVAG, Amsterdam Public Health research institute, VU University Medical Center, Amsterdam, the Netherlands), Ank Dejong (Midwifery Science, AVAG, Amsterdam Public Health research institute, VU University Medical Center, Amsterdam, the Netherlands), Ali Khashan (University College Cork, Department of Epidemiology and Public Health/Irish Centre for Fetal and Neonatal Translational Research (INFANT), Departments of Obstetrics and Gynaecology and Perinatal Epidemiology), Mark Tracy (Neonatal staff specialist, Westmead Hospital, Westmead Newborn Nursery, New South Wales), Soo Downe (UCLan), Esther Feijen-de Jong (Midwifery Science, AVAG, Amsterdam Public Health research institute, VU University Medical Center, Amsterdam, the Netherlands), Hannah Dahlen (Western Sydney University, school of Nursing and Midwifery)