PICU	Pediatric intensive care unit
SDICU	Step-down intensive care unit
PCTICU	Pediatric cardiac intensive care unit
ICU	Intensive care unit
LOS	Length of stay
CBS	Critical Bronchiolitis Score
LRS	Level of respiratory support
HR	Heart rate
RR	Respiratory rate
GCS	Glasgow Coma Scale
pCO2	Partial pressure of carbon dioxide
SBP	Systolic blood pressure
BUN	Blood urea nitrogen
HFNC	High-flow nasal cannula
NIMV	Non-invasive mechanical ventilation
IMV	Invasive mechanical ventilation
CXR	Chest X-ray
IQR	Interquartile range
AAP	American Academy of Pediatrics