1. Laboratory of Infectious Diseases, Kitasato Institute for Life Sciences, Kitasato University, Tokyo, Japan
2. Department of Clinical Laboratory, Kitasato University Medical Center, Kitamoto, Japan
3. Department of Clinical Laboratory, Mishuku Hospital, Federation of National Public Service and Personnel Mutual Aid Associations, Tokyo, Japan
4. Division of Clinical Laboratory, Sanritsu Co., Ltd., Yachiyo, Japan