| PEF | peak expiratory flow; Psychiatric Evaluation Form; pulmonary edema fluid |
|---|---|
| PFTBE | progressive form of tick-borne encephalitis |
| PRF | partial reinforcement; patient report form; perforin; plasma recognition factor; pontine reticular f... |
| RF | radial fiber; radio frequency; receptive field; regurgitant fraction; Reitland-Franklin [unit]; rela... |
| SB-LM | Stanford-Binet Intelligence Test-Form LM |