About the Authors

Hisayuki Shigematsu

h-shige@ba3.so-net.ne.jp

Affiliation Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan

Shinichi Toyooka

Affiliation Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan

Makoto Suzuki

Affiliation Chiba University Graduate School of Medicine, Chiba, Japan

Competing Interests

The authors have declared that no competing interests exist.