About the Authors

Kaori Yamanaka

kaoriymnk@yahoo.co.jp

Affiliation Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan

Hiroi Tomioka

Affiliation Department of Neuropsychiatry, Showa University School of Medicine, Tokyo, Japan

Shingo Kawasaki

Affiliation Hitachi Medical Corporation, Application Development Office, Optical Topography Group, Tokyo, Japan

Yumiko Noda

Affiliation Department of Neuropsychiatry, Showa University School of Medicine, Tokyo, Japan

Bun Yamagata

Affiliation Department of Neuropsychiatry, Showa University School of Medicine, Tokyo, Japan

Akira Iwanami

Affiliation Department of Neuropsychiatry, Showa University School of Medicine, Tokyo, Japan

Masaru Mimura

Affiliation Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan

Competing Interests

The authors have read the journal's policy and have the following conflicts: Dr. Masaru Mimura and Dr. Shingo Kawasaki have potential conflicts of interest. Dr. Masaru Mimura (Showa University, from 2004 to 2011 and Keio University, since 2011) is the principal investigator of this study. Dr. Shingo Kawasaki is an employee of Hitachi Medical Corporation. From 2004 to 2011, Showa University had an official contract with Hitachi Medical Corporation for a collaborative study on the clinical application of Near Infrared Spectroscopy (NIRS). For this study, Hitachi Medical Corporation provided an equipment support (temporary rental of a NIRS system, ETG 4000) from 2004 to 2009. From 2011 to 2013, Keio University had an official contract with Hitachi Medical Corporation for a collaborative study on the clinical application of NIRS. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials. The other authors have no relevant conflicts of interest.

Author Contributions

Conceived and designed the experiments: KY SK YN HT. Performed the experiments: KY YN SK. Analyzed the data: KY SK. Contributed reagents/materials/analysis tools: KY SK YN HT BY AI MM. Wrote the paper: KY.