| PFP | peripheral facial paralysis; platelet-free plasma |
|---|---|
| PFS | patellofemoral syndrome; primary fibromyalgia syndrome; protein-free supernatant; pulmonary function... |
| PIF | paratoid isoelectric focusing variant protein; peak inspiratory flow; proinsulin-free; prolactin-inh... |
| PP1 | free pyrophosphate |
| RAFW | right atrial free wall |