swab real-time reverse transcriptase polymerase chain reaction. Blood cell
count, alanine transaminase, aspartate transaminase, renal function, coagulation
profile, C-reactive protein, liver function, D-dimer, troponin, and arterial
blood gases were also determined. All patients underwent chest radiography or
computed tomography. When there was clinical suspicion of DVT, the patient
underwent a full bilateral lower limb venous duplex ultrasound scan (11 MHz
linear transducer, Logic P6, GE Healthcare, Milwaukee, Wisconsin, United
States). In cases of acute arterial occlusion, an additional arterial duplex
ultrasound scan of the affected lower limb was performed to confirm clinical
suspicion.