1. Department of Infectious Diseases, Keio University School of Medicine, Tokyo, Japan.
2. Division of Food Microbiology, Department of Microbiology, Tokyo Metropolitan Institute of Public Health, Tokyo, Japan.
3. Laboratory of Animal and Human Nutritional Physiology, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan.
4. Center for Advanced Marine Core Research, Kochi University, Nangoku, Kochi, Japan.
5. Department of Parasitology, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia.
6. AIDS Clinical Center, National Center for Global Health and Medicine, Tokyo, Japan.