Funding for this research was provided by:
Perelman School of Medicine, University of Pennsylvania (N/A)
Received: 15 April 2019
Accepted: 1 October 2019
First Online: 26 October 2019
Ethics approval and consent to participate
: Ethical clearance was obtained from the Kilimanjaro Christian Medical Centre Research and Ethics Committee.
: Not applicable.
: The authors declare that they have no competing interests.