1. Department of Neurology National Hospital Organization Kure Medical Center and Chugoku Cancer Center Kure, Hiroshima Japan
2. Department of Respiratory National Hospital Organization Kure Medical Center and Chugoku Cancer Center Kure, Hiroshima Japan
3. Department of Diagnostic Pathology National Hospital Organization Kure Medical Center and Chugoku Cancer Center Kure, Hiroshima Japan
4. Department of Surgery National Hospital Organization Kure Medical Center and Chugoku Cancer Center Kure, Hiroshima Japan