| ROP | Retinopathy of prematurity |
| ELGANS | Extremely low gestational age neonates |
| IH | Intermittent hypoxia |
| Hx | Hyperoxia |
| IGF-I | Insulin-like growth factor-1 |
| VEGF | Vascular endothelial growth factor |
| ECs | Endothelial cells |
| INL | Inner nuclear layer |
| NFL | Nerve fiber layer |
| GCL | Ganglion cell layer |
| ONL | Outer nuclear layer |
| ILM | Inner limiting membrane |
| GFAP | Glial fibrillary acidic protein |
| P14 | Postnatal day 14 |
| P21 | Postnatal day 21 |
| sVEGFR-1 | Soluble vascular endothelial growth factor receptor-1 |
| O2 | Oxygen |
| HIF1α | Hypoxia inducible factor-1α |
| ROS | Reactive oxygen species |
| H2O2 | Hydrogen peroxide |
| OIR | Oxygen-induced retinopathy |
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