About the Authors

Masatoshi Matsumoto

matmo10@jb3.so-net.ne.jp

Affiliation Department of Community-Based Medical System, Faculty of Medicine, Hiroshima University, Hiroshima, Japan

Soichi Koike

Affiliation Division of Health Policy and Management, Center for Community Medicine, Jichi Medical University, Tochigi, Japan

Saori Kashima

Affiliation Department of Public Health and Health Policy, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan

Kazuo Awai

Affiliation Department of Diagnostic Radiology, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MM SKo SKa KA. Analyzed the data: MM SKa. Wrote the paper: MM SKo SKa KA.