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Therapeutic Anticoagulation with Heparin in Noncritically Ill Patients with Covid-19.
Lawler, Patrick R; Goligher, Ewan C; Berger, Jeffrey S; Neal, Matthew D; McVerry, Bryan J; Nicolau, Jose C; Gong, Michelle N; Carrier, Marc; Rosenson, Robert S; Reynolds, Harmony R; Turgeon, Alexis F; Escobedo, Jorge; Huang, David T; Bradbury, Charlotte A; Houston, Brett L; Kornblith, Lucy Z; Kumar, Anand; Kahn, Susan R; Cushman, Mary; McQuilten, Zoe; Slutsky, Arthur S; Kim, Keri S; Gordon, Anthony C; Kirwan, Bridget-Anne; Brooks, Maria M; Higgins, Alisa M; Lewis, Roger J; Lorenzi, Elizabeth; Berry, Scott M; Berry, Lindsay R; Aday, Aaron W; Al-Beidh, Farah; Annane, Djillali; Arabi, Yaseen M; Aryal, Diptesh; Baumann Kreuziger, Lisa; Beane, Abi; Bhimani, Zahra; Bihari, Shailesh; Billett, Henny H; Bond, Lindsay; Bonten, Marc; Brunkhorst, Frank; Buxton, Meredith; Buzgau, Adrian; Castellucci, Lana A; Chekuri, Sweta; Chen, Jen-Ting; Cheng, Allen C; Chkhikvadze, Tamta.
  • Lawler PR; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Goligher EC; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Berger JS; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Neal MD; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • McVerry BJ; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Nicolau JC; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Gong MN; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Carrier M; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Rosenson RS; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Reynolds HR; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Turgeon AF; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Escobedo J; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Huang DT; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Bradbury CA; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Houston BL; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Kornblith LZ; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Kumar A; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Kahn SR; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Cushman M; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • McQuilten Z; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Slutsky AS; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Kim KS; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Gordon AC; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Kirwan BA; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Brooks MM; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Higgins AM; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Lewis RJ; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Lorenzi E; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Berry SM; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Berry LR; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Aday AW; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Al-Beidh F; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Annane D; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Arabi YM; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Aryal D; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Baumann Kreuziger L; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Beane A; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Bhimani Z; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Bihari S; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Billett HH; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Bond L; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Bonten M; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Brunkhorst F; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Buxton M; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Buzgau A; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Castellucci LA; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Chekuri S; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Chen JT; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Cheng AC; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
  • Chkhikvadze T; From the Peter Munk Cardiac Centre at University Health Network (P.R.L., M.E.F., V.D., J.P.G., L.C.G., G.H.), the University of Toronto (P.R.L., E.C.G., A.S.S., M.E.F., V.D., R.A.F., L.C.G., G.H., M.H.), University Health Network (E.C.G., M.H.), St. Michael's Hospital Unity Health (A.S.S., Z.B., J.C
N Engl J Med ; 385(9): 790-802, 2021 Aug 26.
Article in English | MEDLINE | ID: covidwho-1343498
ABSTRACT

BACKGROUND:

Thrombosis and inflammation may contribute to the risk of death and complications among patients with coronavirus disease 2019 (Covid-19). We hypothesized that therapeutic-dose anticoagulation may improve outcomes in noncritically ill patients who are hospitalized with Covid-19.

METHODS:

In this open-label, adaptive, multiplatform, controlled trial, we randomly assigned patients who were hospitalized with Covid-19 and who were not critically ill (which was defined as an absence of critical care-level organ support at enrollment) to receive pragmatically defined regimens of either therapeutic-dose anticoagulation with heparin or usual-care pharmacologic thromboprophylaxis. The primary outcome was organ support-free days, evaluated on an ordinal scale that combined in-hospital death (assigned a value of -1) and the number of days free of cardiovascular or respiratory organ support up to day 21 among patients who survived to hospital discharge. This outcome was evaluated with the use of a Bayesian statistical model for all patients and according to the baseline d-dimer level.

RESULTS:

The trial was stopped when prespecified criteria for the superiority of therapeutic-dose anticoagulation were met. Among 2219 patients in the final analysis, the probability that therapeutic-dose anticoagulation increased organ support-free days as compared with usual-care thromboprophylaxis was 98.6% (adjusted odds ratio, 1.27; 95% credible interval, 1.03 to 1.58). The adjusted absolute between-group difference in survival until hospital discharge without organ support favoring therapeutic-dose anticoagulation was 4.0 percentage points (95% credible interval, 0.5 to 7.2). The final probability of the superiority of therapeutic-dose anticoagulation over usual-care thromboprophylaxis was 97.3% in the high d-dimer cohort, 92.9% in the low d-dimer cohort, and 97.3% in the unknown d-dimer cohort. Major bleeding occurred in 1.9% of the patients receiving therapeutic-dose anticoagulation and in 0.9% of those receiving thromboprophylaxis.

CONCLUSIONS:

In noncritically ill patients with Covid-19, an initial strategy of therapeutic-dose anticoagulation with heparin increased the probability of survival to hospital discharge with reduced use of cardiovascular or respiratory organ support as compared with usual-care thromboprophylaxis. (ATTACC, ACTIV-4a, and REMAP-CAP ClinicalTrials.gov numbers, NCT04372589, NCT04505774, NCT04359277, and NCT02735707.).
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Thrombosis / Heparin / COVID-19 Drug Treatment / Anticoagulants Type of study: Cohort study / Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Limits: Adult / Aged / Female / Humans / Male / Middle aged Language: English Journal: N Engl J Med Year: 2021 Document Type: Article

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Thrombosis / Heparin / COVID-19 Drug Treatment / Anticoagulants Type of study: Cohort study / Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Limits: Adult / Aged / Female / Humans / Male / Middle aged Language: English Journal: N Engl J Med Year: 2021 Document Type: Article