1. Institute of Clinical Medicine, University of Oslo, Norway
2. Better Health for African Mother and Child, P.O. Box 8418 Moshi, Tanzania
3. Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Norway
4. Division of Gynaecology and Obstetrics, Oslo University Hospital, Rikshospitalet, Oslo, Norway
5. Norwegian National Advisory Unit for Women’s Health, Oslo, Norway
6. Institute of Public Health, Department of Community Health, Kilimanjaro Christian Medical University College, P.O. Box 2240, Moshi, Tanzania
7. Institute of Public Health, Department of Epidemiology and Biostatistics, Kilimanjaro Christian Medical University College, P.O. Box 2240, Moshi, Tanzania