Funding for this research was provided by:
Bill and Melinda Gates Foundation
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP),
Received: 20 December 2019
Revised: 23 January 2020
Accepted: 26 February 2020
First Online: 17 March 2020
Change Date: 15 August 2020
Change Type: Update
Change Details: The Pubmed citation previously considered the authors’ middle name as last name. This has now been fixed.
Compliance with ethical standards
: The authors declare that they have no conflict of interest.