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