1. University of Otago; Public Health and General Practice; Box 4345 Christchurch Canterbury New Zealand 8140
2. Catharina Hospital Eindhoven; Department of Gynaecology, Division of Reproductive Medicine; Michelangelolaan 2 Eindhoven Netherlands NL 5623 EJ
3. FHI 360; Clinical Sciences; 359 Blackwell St, Suite 200 Durham North Carolina USA 27701
4. UN House Pulchowk; Health and Nutrition Section; P.O. Box 1187 Kathmandu Nepal
5. The Ohio State University; Division of Epidemiology; Room 324 Cunz Hall 1841 Neil Avenue Columbus Ohio USA 43210-1351