1. Department of Community Medicine and Public Health, National Medical College, Birgunj, Parsa 44300, Nepal
2. HelpAge International, Kathmandu 44600, Nepal
3. Research Triangle Institute International, Kathmandu 44600, Nepal
4. Narayani Sub-Regional Hospital, Birgunj, Parsa 44300, Nepal
5. School of Public Health and Community Medicine, B.P. Koirala Institute of Health Sciences, Dharan, Sunsari 56700, Nepal
6. Department of Obstetrics and Gynaecology, B.P. Koirala Institute of Health Sciences, Dharan, Sunsari 56700, Nepal