1. Department of Internal Medicine, Tosatamura Hospital, Kochi, Japan,
2. Department of Hematology, Kochi Medical School, Kochi University, Nankoku, Japan,
3. Department of Urology, Kochi Medical School, Kochi University, Nankoku, Japan,
4. Department of Microbiology and Infection, Kochi Medical School, Kochi University, Nankoku, Japan