McMillan, J. M., H. B. Krentz, M. J. Gill, and D. B. Hogan. “An Emerging Concern—High Rates of Frailty Among Middle-Aged and Older Individuals Living With HIV”. Canadian Geriatrics Journal, vol. 22, no. 4, Dec. 2019, pp. 190-8, doi:10.5770/cgj.22.387.