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Authors
Mrema, Sigilbert
Okumu, Fredros
Schellenberg, Joanna
Fink, Günther
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Funding
Funding for this research was provided by:
University of Basel
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Article History
Received: 19 December 2022
Accepted: 13 April 2023
First Online: 25 April 2023
Declarations
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: The study was approved by relevant ethics review boards in Tanzania, Switzerland and the United Kingdom. Parents or guardians of young children gave oral consent for data collected from 1998 to 2003. In 2019, we obtained written consent from participants interviewed in-person and oral consent from those interviewed by telephone. All data and other participant information collected were confidential.
: Not applicable.
: The authors declare no competing interests.
