COVID-19(14) coronavirus(10) SARS-CoV-2(9) patients(9) disease(8) patients with COVID-19(7) complications(7) was performed(7) significantly(7) Patient(7) hypercoagulable(6) Comorbidities(6) caused(6) Result(6) less(6) Coronavirus disease 2019(6) with COVID-19(6) objective(6) acute respiratory syndrome(6) thrombosis(6) positive(6) highlight(5) Thromboembolism(5) elevated(5) Thrombotic events(5) retrospective(5) Factor(5) increased risk(5) infected with COVID-19(5) study cohort(5)