Funding for this research was provided by:
JSPS (Grants-in-Aid for Scientific Research) KAKENHI (grant 17K12604)
Article History
Received: 13 September 2021
Accepted: 10 July 2022
First Online: 18 July 2022
Declarations
:
: This study was approved by the Ethics Committee of Himeji Dokkyo University (Approval Number: 18–11) and the Vanuatu Ministry of Health Executive Committee (Approval Number: DPH02/2-LT/mt). The study procedures were carried out in accordance with the principles of the Declaration of Helsinki. Informed consent was obtained from all individual participants involved in the study.
: Not applicable.
: The authors declare that they have no competing interests.