1. Janet W Rich-Edwards, ScD, MPH, Assistant Professor of Medicine, Harvard Medical School, Director of Developmental Epidemiology, Division of Women's Health & Connors Center for Women's Health & Gender Biology, Department of Medicine, Brigham & Women's Hospital, 1620 Tremont Street, 3rd floor, Boston, MA 02120, USA, Tel.: +1 617 525 8264, Fax: +1 617 525 7746,