COVID-19(2) presenting symptoms(1) Coagulopathy(1) country(1) symptomatic(1) reported(1) Venous thrombosis(1) Singapore(1) presenting(1) Stroke metrics.(1) patients(1) Seizure(1) C-reactive protein(1) hemorrhage(1) headache(1) surviving patients(1) Survivors(1) tested(1) Thromboembolism(1) mortality rate(1) treated(1) respiratory(1) Stay-at-home order(1) Cerebral venous thrombosis(1) multicenter study(1) COVID-19 patient(1) outcome(1) cerebrovascular diseases(1) Stroke.(1) venous(1)