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Liu Y, Morgenstern C, Kelly J, Lowe R; CMMID COVID-19 Working Group; Jit M.Liu Y, et al.BMC Med. 2021 Feb 5;19(1):40. doi: 10.1186/s12916-020-01872-8.BMC Med. 2021.PMID: 33541353Free PMC article.
Li Y, Campbell H, Kulkarni D, Harpur A, Nundy M, Wang X, Nair H; Usher Network for COVID-19 Evidence Reviews (UNCOVER) group.Li Y, et al.Lancet Infect Dis. 2021 Feb;21(2):193-202. doi: 10.1016/S1473-3099(20)30785-4. Epub 2020 Oct 22.Lancet Infect Dis. 2021.PMID: 33729915Free PMC article.
Regmi K, Lwin CM.Regmi K, et al.Int J Environ Res Public Health. 2021 Apr 17;18(8):4274. doi: 10.3390/ijerph18084274.Int J Environ Res Public Health. 2021.PMID: 33920613Free PMC article.Review.
Mendez-Brito A, El Bcheraoui C, Pozo-Martin F.Mendez-Brito A, et al.J Infect. 2021 Sep;83(3):281-293. doi: 10.1016/j.jinf.2021.06.018. Epub 2021 Jun 20.J Infect. 2021.PMID: 34161818Free PMC article.Review.
Bo Y, Guo C, Lin C, Zeng Y, Li HB, Zhang Y, Hossain MS, Chan JWM, Yeung DW, Kwok KO, Wong SYS, Lau AKH, Lao XQ.Bo Y, et al.Int J Infect Dis. 2021 Jan;102:247-253. doi: 10.1016/j.ijid.2020.10.066. Epub 2020 Oct 29.Int J Infect Dis. 2021.PMID: 33129965Free PMC article.