1. Department of Radiology, Chugoku Rosai Hospital, Kure, Japan
2. Department of Diagnostic Radiology, Graduate School of Biomedical and Health Sciences, Hiroshima University Hospital, Hiroshima, Japan
3. Department of Radiology, Memorial Jun Makidono Hospital, Hiroshima, Japan
4. Department of Internal Medicine, Chugoku Rosai Hospital, Kure, Japan