1. Department of Hematology, Japan Community Healthcare Organization (JCHO) Tokyo Yamate Medical Center, Shinjuku City, Tokyo, Japan
2. Department of Surgery, Japan Community Healthcare Organization (JCHO) Tokyo Yamate Medical Center, Shinjuku City, Tokyo, Japan
3. Department of Pathology, Japan Community Healthcare Organization (JCHO) Tokyo Yamate Medical Center, Shinjuku City, Tokyo, Japan