1. Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal, Private Bag, X54001 Durban, South Africa
2. School of Pharmacy, The University of Texas at El Paso, 500 W. University Avenue, El Paso, Texas 79968, United States
3. Division of Emergency Medicine, Department of Surgery, University of Cape Town, Cape Town 7700, South Africa