Funding for this research was provided by:
Viral Hepatitis Research Foundation of Japan (None)
Ministry of Health, Labour and Welfare, Japan (H28-Kansei-Japan-001)
Project Research Centre for epidemiology and prevention of viral hepatitis and hepatocellular carcinoma, Hiroshima University, Japan (None)
World Health Organization: The Expanded Programme on Immunization (None)
Text and Data Mining valid from 2020-04-25
Received: 30 January 2020
Accepted: 12 April 2020
First Online: 25 April 2020
Ethics approval and consent to participate
: Written informed consent was obtained from the mother for her child and herself; if the mother was absent, the father or other caretaker was asked to provide written informed consent for the child. Informed assent was obtained from all children in the study. All specimens and questionnaire data were de-identified, with reference only to a unique identifier. The study protocol was approved by the Cambodia National Ethics Committee for Human Research (392NECHR), the Ethics Review Committee for the WHO Western Pacific Region and the Ethical Committee for Epidemiology of Hiroshima University (E-573) and the study procedure strictly followed the Declaration of Helsinki for research including human beings.
: Not applicable.
: The authors declare no conflict of interests.