| PES | Patient Escort Service; photoelectron spectroscopy; physicians' equity services; polyethylene sulfon... |
|---|---|
| PHBQ | Physicians' Humanistic Behaviors Questionnaire |
| PHS | Physicians' Health Study; pooled human serum; posthypnotic suggestion; Public Health Service |
| PNHA | Physicians National Housestaff Association |
| PRN | Physicians Research Network; polyradiculoneuropathy; prion |