Ende, Victoria J, Gurinder Singh, Ioannis Babatsikos, Wei Hou, Haifang Li, Henry C Thode, Adam J Singer, Tim Q Duong, and Paul S Richman. 2021. “Survival of COVID-19 Patients With Respiratory Failure Is Related to Temporal Changes in Gas Exchange and Mechanical Ventilation”. Journal of Intensive Care Medicine 36 (10): 1209-16.