Khalid S. Khan is Beatriz Galindo Distinguished Investigator at the University of Granada, Spain and has been Sims Black Fellow of the UK Royal College of Obstetricians and Gynaecologists, Spinoza Professor at the University of Amsterdam, the Netherlands, Fellow of the Pakistani College of Physicians and Surgeons, and Fellow of the UK Higher Education Academy.

Javier Zamora is Head of the Clinical Biostatistics Unit at Ramon y Cajal University Hospital and the Director of the Clinical Epidemiology at the Ramon y Cajal Biomedical Research Institute (IRYCIS), Madrid Spain and is Professor of Biostatistics in Maternal and Perinatal Health at the University of Birmingham, UK.