| ANOVA | analysis of variance |
| CPAP | continuous positive airway pressure |
| ET tube | endotracheal tube |
| Gy | Gray |
| HFOV | High-frequency oscillatory ventilation |
| H2O | water |
| IPPV | intermittent positive pressure ventilation |
| LU | lung ultrasound |
| MHz | megahertz |
| N | number |
| NICU | neonatal intensive care unit |
| NY | New York |
| RD | respiratory distress |
| RDS | respiratory distress syndrome |
| SIMV | synchronized intermittent mandatory ventilation |
| TTN | transient tachypnea of the newborn |
| WI | Wisconsin |
| Vs | versus |
| X-rays | radiograph |
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