1163: NONINVASIVE VENTILATION USE PRIOR TO INTUBATION IN PEDIATRIC HEMATOPOIETIC CELL TRANSPLANT PATIENTS. (16th December 2021) - Cater, Daniel; Fitzgerald, Julie; Gertz, Shira; McArthur, Jennifer; Daniel, Megan; Mahadeo, Kris; Hsing, Deyin; Smith, Lincoln; Pike, Francis; Rowan, Courtney