Funding for this research was provided by:
National Institute of Mental Health (5U19MH095699)
Received: 2 August 2017
Accepted: 16 March 2018
First Online: 23 March 2018
Ethics approval and consent to participate
: Ethics approval for the study was granted through the University of Cape Town Health Sciences Human Research Ethics Committee (HREC Reference no: 226/2011 and 842/2014).The full protocol is registered on the PROSPERO database URL (ExternalRef removed).
: Not applicable.
: The authors declare that they have no competing interests.
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