| PAS | para aminosalicylate; Parent Attitude Scale; patient administration system; patient appointments and... |
|---|---|
| PES | Patient Escort Service; photoelectron spectroscopy; physicians' equity services; polyethylene sulfon... |
| QLS | Quality of Life Scale; quasielastic light-scattering spectroscopy |
| RAIS | reflection-absorption infrared spectroscopy |
| RELAY | relayed correlation spectroscopy |