Article History
Received: 4 June 2019
Accepted: 20 September 2019
First Online: 5 December 2019
Ethics approval and consent to participate
: Ethics approval for this project was obtained from Human Ethics committee at The University of Sydney (Project number: 2017/723) and the Research Ethics Review Committee (WHO ERC) at WHO (Protocol ID: 00001). Informed consent was obtained from all participants.
: Not applicable.
: ZW, QG and LP declare that they have no competing interests. LB has chaired WHO guideline development committees and provided support for the Essential Medicines List.