About the Authors

Hiroko Yamada

Affiliation Department of Epidemiology, Infectious Disease Control and Prevention, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan

Kazuaki Takahashi

Affiliation Department of Medical Sciences, Toshiba General Hospital, Tokyo, Japan

Olline Lim

Affiliation Ministry of Health, Phnom Penh, Cambodia

Somana Svay

Affiliation Ministry of Health, Phnom Penh, Cambodia

Channarena Chuon

Affiliation Department of Epidemiology, Infectious Disease Control and Prevention, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan

Sirany Hok

Affiliation Ministry of Health, Phnom Penh, Cambodia

Son Huy Do

Affiliations Department of Epidemiology, Infectious Disease Control and Prevention, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan, Binh Thuan Medical College, Phan Thiet City, Binh Thuan Province, Vietnam

Mayumi Fujimoto

Affiliation Department of Epidemiology, Infectious Disease Control and Prevention, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan

Tomoyuki Akita

Affiliation Department of Epidemiology, Infectious Disease Control and Prevention, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan

Noboru Goto

Affiliation Department of Management Studies, Graduate School of Social Sciences, Hiroshima University, Hiroshima, Japan

Keiko Katayama

Affiliation Department of Epidemiology, Infectious Disease Control and Prevention, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan

Masahiro Arai

Affiliation Department of Medical Sciences, Toshiba General Hospital, Tokyo, Japan

Junko Tanaka

jun-tanaka@hiroshima-u.ac.jp

Affiliation Department of Epidemiology, Infectious Disease Control and Prevention, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HY OL SS SH SHD JT. Performed the experiments: HY KT KK MA. Analyzed the data: HY KT TA KK JT. Contributed reagents/materials/analysis tools: NG JT. Wrote the paper: HY KT JT. Survey for blood sampling: HY OL SS CC SH SHD MF TA NG JT. Coordinate the survey between Japan and Cambodia: SS JT.