1. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (KRE)
2. Faculty of Physical Activity and Sports Sciences, INEF, Technical University of Madrid, Madrid, Spain (RB)
3. School of Human Movement Studies, University of Queensland, St Lucia, Queensland, Australia (WJB)
4. Inserm, Centre for Research in Epidemiology and Population Health (CESP), Université Paris-Sud, Villejuif, France (PD-M)
5. Department of Midwifery and Women’s Health, Division of Health Sciences & Nursing, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan (MH)