| PLL | peripheral light loss; phase-locked loop; poly-L-lysine; pressure length loop; posterior longitudina... |
|---|---|
| PVL | perivalvular leakage; permanent vision loss |
| REL | rate of energy loss; recommended exposure limit; resting expiratory level |
| SHL | sensorineural hearing loss |
| SNHL | sensorineural hearing loss |
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