Funding for this research was provided by:
Templeton World Charity Foundation (TWCF-0087)
Received: 4 April 2019
Accepted: 11 July 2019
First Online: 22 July 2019
Change Date: 22 June 2020
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via the original article.
Ethics approval and consent to participate
: This study was approved by National University of Singapore’s Institutional Review Board. Informed written consent was obtained from all participants prior to their enrolment in in the study.
: Not applicable. This manuscript does not contain details, images, or videos relating to an individual person.
: The authors declare that they have no competing interests.