| SDA | Strong dark avoidance. |
| GAD | Generalized anxiety disorder |
| BZDs | Benzodiazepines |
| SSRIs | Selective serotonin reuptake inhibitors |
| SNRIs | Serotonin-norepinephrine reuptake inhibitors |
| 5-HT | 5-hydroxytryptamine, serotonin |
| GABA | Gamma-aminobutyric acid |
| CILD | Light/dark choice index |
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