1. Faculty of Nursing, Airlangga University, Surabaya, INDONESIA
2. Faculty of Medicine, University of Malaya, Kuala Lumpur, MALAYSIA
3. Faculty of Nursing and Midwifery, Universitas Nahdlatul Ulama Surabaya, Surabaya, INDONESIA
4. STIKES Yarsi Mataram, Mataram, INDONESIA