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2. http://www.who.int/tb/publications/global_report/en/
3. Shisana O http://www.hsrc.ac.za/en/media-briefs/hiv-aids-stis-and-tb/plenary-session-3-20-june-2013-hiv-aids-in-south-africa-at-last-the-glass-is-half-full#sthash.2JYWOdSI.dpuf
4. The changing epidemiology of liver disease in HIV patients;Soriano;AIDS Rev,2013