1. FHI 360; Clinical and Epidemiological Sciences; 359 Blackwell St, Suite 200 Durham North Carolina USA 27701
2. University of North Carolina; Department of Obstetrics and Gynaecology; 4012 Old Clinic Building, CB 7570 Chapel Hill NC - North Carolina USA 27599
3. FHI 360; Biostatistics; 359 Blackwell St, Suite 200 Durham North Carolina USA 27701
4. Oregon Health & Science University; Dept. of Obstetrics and Gynecology; Portland Oregon USA
5. Global Health Access Program; Mae Sot Tak Thailand 63110
6. Princeton University; Office of Population research; Wallaca Hall Princeton New Jersey USA NJ 08544
7. Leiden University Medical Center; Dept. of Clinical Epidemiology; PO Box 9600 Albinusdreef 2 Leiden Netherlands NL 2300 RC