Funding for this research was provided by:
Received: 28 June 2021
Accepted: 28 February 2022
First Online: 10 May 2022
: Ethical approval was obtained from the Ethics Committee of the National Institute for Medical Research, Tanzania (NIMR/HQ/R.8a/Vol.IX./2975) and the University of Duisburg-Essen, Germany (13–5623-BO). Further permission was obtained at the respective regional, district, and ward level. After an information session with parents and children on all study procedures, rights of participants as well as data handling, informed consent and assent forms were signed by all parents of participating children (by signature or fingerprint) and children, respectively. This consent procedure was approved by Ethics Committee of the National Institute for Medical Research, Tanzania. All assessments were conducted in compliance with the Declaration of Helsinki and its later amendments.
: Not applicable.
: The authors declare that they have no competing interests.