EFFECTS OF MELATONIN ON THE HISTOMORPHOMETRY OF THE PANCREAS, LIVER AND KIDNEY OF RATS ON ANTIRETROVIRAL TREATMENT by Danélle Truter Thesis presented in fulfilment of the requirements for the degree of Master of Science the Faculty of Health Sciences at Stellenbosch University. The financial assistance of the National Research Foundation (NRF) towards this research is hereby acknowledged. Opinions expressed, and conclusions arrived at, are of the author and are not necessarily to be attributed to the NRF. Supervisor: Prof. S.H. Kotzé Co-supervisor: Dr. N. Chellan December 2017