1. Perinatology Research Branch; Eunice Kennedy Shriver National Institute of Child Health and Human Development/National Institutes of Health/Department of Health and Human Services; Bethesda MD and Detroit, MI USA
2. Lincoln College; University of Oxford; Oxford UK
3. Nuffield Department of Obstetrics & Gynaecology; Women's Centre; University of Oxford; John Radcliffe Hospital; Oxford UK
4. Oxford Maternal & Perinatal Health Institute; Green Templeton College; Oxford UK