Article History
Received: 25 October 2018
Accepted: 8 January 2019
First Online: 25 January 2019
Ethics approval and consent to participate
: Submission was made to and approval given by the South African Military Health Service (SAMHS) 1 Military Hospital Research Ethics Committee for the study. Each participant was fully briefed and asked to voluntarily sign an informed consent form prior to commencing with the trial.
: Not applicable.
: The authors declare that they have no competing interests.