Funding for this research was provided by:
Centre of Excellence for Population Ageing Research - Australian Research Council (CE1101029)
Australian Research Council (DP160103023, DP160103023, DP160103023)
Received: 30 November 2017
Accepted: 5 December 2018
First Online: 11 January 2019
Ethics approval and consent to participate
: Human ethics application was approved by the Chair of the Science and Medical Delegated Ethics Review Committee, The Australian National University (Protocol 2016/319). Participant consent was not necessary as this study involved the use of a de-identified database according to National Statement on Ethical Conduct in Human Research 2007.
: Anonymised data were obtained from the WHO Multi-Country Studies Data Archive.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.