Does Coronavirus Disease 2019 (COVID-19) Affect Perioperative Morbidity and Mortality for Patients Requiring Emergency Instrumented Spinal Surgery? A Single-Center Cohort Study

2019冠状病毒病（COVID-19）是否会影响需要紧急脊柱手术患者的围手术期发病率和死亡率？一项单中心队列研究