| PES | Patient Escort Service; photoelectron spectroscopy; physicians' equity services; polyethylene sulfon... |
|---|---|
| PLES | parallel-line equal space |
| RRS | retrorectal space; Richards-Rundle syndrome |
| RSTS | retropharyngeal soft tissue space |
| SES | Society of Eye Surgeons; socioeconomic status; spatial emotional stimulus; sphenoethmoidal suture; s... |