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GBD 2019 Blindness and Vision Impairment Collaborators; Vision Loss Expert Group of the Global Burden of Disease Study.GBD 2019 Blindness and Vision Impairment Collaborators, et al.Lancet Glob Health. 2021 Feb;9(2):e144-e160. doi: 10.1016/S2214-109X(20)30489-7. Epub 2020 Dec 1.Lancet Glob Health. 2021.PMID: 33275949Free PMC article.