Avihingsanon A, Tangkijvanich P, Ramautarsing RA, Apornpong T, Jirajariyavej S, Ruxrungtham K and HIV-NAT 125 study team. Predictors of Advanced Liver Fibrosis among HIV/HCV Co-infection and HCV Mono-infection in Thailand: The Role of HIV and Hypovitaminosis D. Abstract number: A-535-0022-02981