About the Authors

Koji Wada


Affiliation Department of Public Health, Kitasato University School of Medicine, Sagamihara, Japan

Derek R. Smith

Affiliation School of Health Sciences, Faculty of Health, University of Newcastle, Brush Road, Ourimbah, Australia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KW. Performed the experiments: KW. Analyzed the data: KW. Contributed reagents/materials/analysis tools: KW. Wrote the paper: KW DRS.