Funding for this research was provided by:
Wellcome Trust (203286/Z/16/Z)
Received: 16 April 2021
Accepted: 8 November 2021
First Online: 24 November 2021
: Ethical approval for this work was obtained from the London School of Hygiene and Tropical Medicine (28 August 2018).
: Not applicable.
: The authors declare that they have no competing interests.