Funding for this research was provided by:
Hector Stiftung, Weinheim , Germany (M72)
Received: 3 March 2020
Accepted: 15 May 2020
First Online: 20 May 2020
Ethics approval and consent to participate
: The study protocol and procedures have been approved by the respective committees of Malawi and Germany. In particular the National Health Sciences Research Committee (NHSRC), Malawi Protocol Number #1199 and the Ethic Committee of the Medical Faculty of the University Heidelberg, Protocol Number S-293/2014. All participants gave written consent.
: Not applicable.
: The authors declare no conflict of interest.