Crombach, Anselm http://orcid.org/0000-0001-5586-0356
Siehl, Sebastian
Article History
Received: 18 October 2017
Accepted: 25 June 2018
First Online: 18 July 2018
Ethics approval and consent to participate
: The research project was approved by the ethics committee of the University Lumière of Bujumbura, Burundi. All participants provided written informed consent to participate in this study. In the case of minor-aged participants, a guardian provided additional written informed consent.
: Not applicable
: The authors declare that they have no competing interests.
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