| POF | pattern of failure; position of function; premature ovarian failure; primary ovarian failure; pyruva... |
|---|---|
| PSF | peak scatter factor; peptide supply factor; point spread function; pseudosarcomatous fasciitis |
| y | Greek letter psi; wave function |
| QENF | quantifying examination of neurologic function |
| RFS | relapse-free survival; renal function study; rotating frame spectroscopy |