About the Authors

Ai Hori

Affiliation Department of Epidemiology and Prevention, Clinical Research Center, National Institute for Global Health and Medicine, Tokyo, Japan

Koji Wada

kwada-sgy@umin.ac.jp

Affiliation Bureau of International Health Cooperation, National Institute for Global Health and Medicine, Tokyo, Japan

Derek R. Smith

Affiliation School of Health Sciences, Faculty of Health and Medicine, University of Newcastle, Ourimbah, Australia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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