Funding for this research was provided by:
Yonsei University (2016-32-0050)
Received: 13 June 2019
Accepted: 14 January 2020
First Online: 28 January 2020
Ethics approval and consent to participate
: The Study on Global AGEing and adult health (SAGE) was approved by the Ethics Review Committee, World Health Organization, Geneva, Switzerland and the individual ethics committees in each of the SAGE countries. Written informed consent was obtained from all respondents before the interviews were initiated. The Duke University Health System IRB determined the current study as an exempt study (Protocol ID: Pro00070390).
: Not applicable.
: The authors declare that they have no competing interests.