1 Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan.
2 School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan.
3 Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan. Electronic address: komorimo@nagasaki-u.ac.jp.