| Affiliation: | 1. Department of Medical Gastroenterology, Otaru-Ekisaikai Hospital, 1-4-1Inaho, Otaru, Hokkaido 047-0032, Japan;2. Department of Diagnostic Pathology, Sapporo-Kosei General Hospital, N3W8-5 Chuo-ku, Sapporo, Hokkaido 060-0033, Japan;3. Department of Internal Medicine, Division of Gastroenterology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8603, Japan;4. Department of Parasitology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan;5. Graduate School of Environmental Earth Science, Hokkaido University, N10W5 Kita-ku, Sapporo, Hokkaido 060-0810, Japan;6. National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Nishi-2-13 Inada-cho, Obihiro, Hokkaido 080-8555, Japan |
