Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (HA2697/18-1)
Received: 1 October 2018
Accepted: 11 April 2019
First Online: 14 May 2019
Ethics approval and consent to participate
: The research protocol was reviewed and approved by the Ethics Committee of the University of Fort Hare Eastern Cape South Africa (registration number Rec-270710-028-RA level 01) and by the management of Chris Hani Baragwanath Academic Hospital (CHBAH), Soweto South Africa (registration number M160228) [Additional file InternalRef removed]. Written informed consent was obtained from all participants while for the patients below 18 years, consents were gotten from their parents or guardians after telling them the significance of the research. The study was conducted in accordance with the Helsinki declaration.
: Not applicable.
: The authors declare that they have no competing interests.
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