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Article History

Received: 11 September 2017

Accepted: 16 February 2018

First Online: 23 February 2018

Ethics approval and consent to participate

: The study was approved as a nonhuman-subject, quality-improvement study by the Netcare research operations committee and the approval waived by the University of Stellenbosch ethics committee.

: Not applicable.

: The authors declare that they have no competing interests.

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