1. Doctoral Program of Public Health, Faculty of Public Health, Universitas Airlangga, Mulyorejo, Surabaya, Indonesia.
2. Study Program of Nursing Science, Faculty of Medicine, University of Brawijaya, Malang, Indonesia.
3. Faculty of Nursing, Universitas Airlangga, Mulyorejo, Surabaya, Indonesia.
4. Faculty of Medicine, University of Muhammadiyah Malang, Malang, Indonesia.