FEI-RAN GUO2021-02-042021-02-0420201617-9625https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086660683&doi=10.18332%2fTID%2f121915&partnerID=40&md5=cdffb0736c5f98041adb6d5255a7a8ffhttps://scholars.lib.ntu.edu.tw/handle/123456789/548430COVID-19; Meta-analysis; Smoking[SDGs]SDG3artificial ventilation; coronavirus disease 2019; death; disease exacerbation; disease severity; human; intensive care unit; Letter; meta analysis (topic); priority journal; risk factor; sample size; smokingActive smoking is associated with severity of coronavirus disease 2019 (COVID-19): An update of a meta-analysisletter10.18332/TID/1219152-s2.0-85086660683