471: NONINVASIVE VENTILATION VERSUS INVASIVE WEANING IN CRITICALLY ILL ADULTS. (January 2022) - Burns, Karen E.A.; Stevenson, James; Laird, Matthew; Adhikari, Neill K.J.; Li, Yuchong; Lu, Cong; He, Xiaolin; Wang, Wentao; Liang, Zhenting; Chen, Lu; Zhang, Haibo; Friedrich, Jan O.