| SDB | Sleep disordered breathing |
| CSA | Central sleep apnea |
| SNP | Single-nucleotide polymorphism |
| MeSH | Medical subject headings |
| OSA | Obstructive sleep apnea |
| OIRD | Opioid-induced respiratory depression |
| AHI | Apnea-hypopnea index |
| MME | Morphine milligram equivalents |
| IL-1β | Interleukin-1β |
| TNF-α | Tumor necrosis factor-α |
| Val | Valine |
| Met | Methionine |
| CYP2D6 | Cytochrome P450 2D6 gene |
| UMs | Ultrarapid metabolizers |
| PAP | Positive airway pressure |
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