Funding for this research was provided by:
Received: 28 November 2016
Accepted: 31 January 2018
First Online: 12 February 2018
Ethics approval and consent to participate
: Ethical approval was obtained from the Ethikkommission, Medizinische Fakultät Heidelberg with reference numberS-153/2014and from the National Health Research Committee, Rwanda with reference numberNHRC/2014/PROT/0152. All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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