Faust, Lena
Yaya, Sanni http://orcid.org/0000-0002-4876-6043
Article History
Received: 13 June 2018
Accepted: 1 November 2018
First Online: 13 November 2018
Ethics approval and consent to participate
: Ethics approval for this study was not required since the data is secondary and is available in the public domain.
: No consent to publish was needed for this study as we did not use any details, images or videos related to individual participants. In addition, data used is available in the public domain.
: The authors declare that they have no competing interests.
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