| PPE | Plasma protein extravasation |
|---|---|
| PPE | Porcine pancreatic elastase |
| PPE | Preproenkephalin |
| PPEnk | Preproenkephalin |
| PPET-1 | Prepro-ET-1 |
| ppET-1 | Preproendothelin-1 |
| PPF | Paired pulse facilitation |
| PPF | Papillary plasma flow |
| PPF | Photosynthetic photon flux |
| PPF | Plasma Protein Fraction |