MacLeod S, Tkatch R, Kraemer S, Fellows A, McGinn M, Schaeffer J, Yeh CS. COVID-19 era social isolation among older adults. Geriatrics. 2021 May 18;6(2):52. doi: 10.3390/geriatrics6020052
McKenna SP, Doward LC. How should we measure quality of life in ankylosing spondylitis? Rheumatol Pract. 2008;6(2):12-4.