Funding for this research was provided by:
Economic and Social Research Council (ES/K009990/1)
Article History
Received: 16 August 2018
Accepted: 19 September 2018
First Online: 29 September 2018
Ethics approval and consent to participate
: The project was approved by the Ethics Committee for Health Research in Cambodia (Ref. 476 NECHR), the Ministry of Science and Technology in Vietnam, and the ethics committee at the London School of Hygiene and Tropical Medicine (Ref. 10483). Informed consent was obtained for all interviews.
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.