| PhEEM | photoemission electron microscopy |
|---|---|
| PLM | percent labeled mitoses; periodic leg movement; plasma level monitoring; polarized light microscopy |
| PXM | projection x-ray microscopy; pseudoexfoliation material |
| RF | radial fiber; radio frequency; receptive field; regurgitant fraction; Reitland-Franklin [unit]; rela... |
| RFE | relative fluorescence efficiency |