1. Faculty of Public Health, UNAIR, Surabaya, Jawa Timur, Indonesia
2. Department of Epidemiology, Population Biostatistics and Health Promotion, Faculty of Public Health, UNAIR, Surabaya, Jawa Timur, Indonesia
3. Diploma IV Program of Nursing, Politeknik Kesehatan Kemenkes Palangka Raya, Palangka Raya, Kalimantan Tengah, Indonesia
4. Diploma III Program of Midwifery, Politeknik Kesehatan Kemenkes Palangka Raya, Palangka Raya, Center of Kalimantan, Indonesia