| PEI | Patient Exit Interview; phosphate excretion index; physical efficiency index; polyethyleneimine |
|---|---|
| PER | peak ejection rate; periodogram; protein efficiency ratio |
| RFE | relative fluorescence efficiency |
| S&E | safety and efficiency |
| VE | vaginal examination; Venezuelan encephalitis; venous emptying; venous extension; ventilation; ventil... |