| TFR | total fertility rate; total flow resistance; transferrin receptor |
|---|---|
| TR | recovery time; rectal temperature; repetition time; residual tuberculin; terminal repeat; tetrazoliu... |
| AR | absolute risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resista... |
| EPR | early progressive resistance; electron paramagnetic resonance; electronic patient record; electrophr... |
| PVR | peripheral vascular resistance; perspective volume rendering; poliovirus receptor; postvoiding resid... |