1. Postgraduate School, Universitas Airlangga, Surabaya, East Java, Indonesia
2. Indonesia-Japan Collaborative Research Center for Emerging and Re-Emerging Infectious Diseases, Institute of Tropical Disease, Universitas Airlangga, Surabaya, East Java, Indonesia
3. Department of Epidemiology, Faculty of Public Health, Universitas Airlangga, Surabaya, East Java, Indonesia
4. Faculty of Medicine, Universitas Airlangga, Surabaya, East Java, Indonesia
5. Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan