1Indonesia-Japan Collaborative Research Center for Emerging and Re-emerging Infectious Diseases, Institute of Tropical Disease, Airlangga University, Surabaya, Indonesia, E-mail: tutsumi@people.kobe-u.ac.jp
2Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Japan, E-mail: tutsumi@people.kobe-u.ac.jp