Ranzani O, Alari A, Olmos S, Mila C, Rico A, Ballester J, Basagana X, Chaccour C, Dadvand P, Duarte-Salles T, Foraster M, Nieuwenhuijsen M, Sunyer J, Valentin A, Kogevinas M, Lazcano U, Avellaneda-Gomez C, Vivanco R, Tonne C. Long-term exposure to air pollution and severe COVID-19 in Catalonia: a population-based cohort study. Nat Commun. 2023 May 24;14(1):2916. doi: 10.1038/s41467-023-38469-7
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