Extensive Iliocaval Deep Vein Thrombosis Provoked by Coronavirus Disease 2019 (COVID-19) in the Setting of an Inferior Vena Cava Filter

新型冠状病毒肺炎（COVID-19）诱发广泛性髂静脉深静脉血栓形成，患者已植入下腔静脉滤器