1. Diagnoses of HIV infection among adults aged 50 years and older in the United States and dependent areas, 2007-2010.
2. HIV in the United States: At a glance.
3. 2008. Basics of qualitative research, 3rd ed.;Corbin
4. K., Burns, N., Gray, J.R. 2013. The practice of nursing research: Appraisal, synthesis and generation of evidence, 7th ed. Elsevier Saunders, St.;Grove
5. New York City HIVAIDS semi-annual surveillance statistics.