| RPPI | role perception picture inventory |
|---|---|
| SFP | screen filtration pressure; simultaneous foveal perception; spinal fluid pressure; stopped flow pres... |
| SP | sacroposterior; sacrum to pubis; salivary progesterone; schizotypal personality; semi-private [room]... |
| SPI | Self-Perception Inventory; serum precipitable iodine; serum protein index; Shipley Personal Inventor... |
| SPOD | spouse's perception of disease |