Coronavirus disease 2019 (COVID-19): an evidence map of medical literature.
Liu N, Chee ML, Niu C, Pek PP, Siddiqui FJ, Ansah JP, Matchar DB, Lam SSW, Abdullah HR, Chan A, Malhotra R, Graves N, Koh MS, Yoon S, Ho AFW, Ting DSW, Low JGH, Ong MEH.
Liu N, et al.
BMC Med Res Methodol. 2020 Jul 2;20(1):177. doi: 10.1186/s12874-020-01059-y.
BMC Med Res Methodol. 2020.
PMID: 32615936
Free PMC article.