| PAI-1 | plasminogen-activator inhibitor-1 |
|---|---|
| PCI | patient classification index; pneumatosis cystoides intestinales; prophylactic cranial irradiation; ... |
| PGSI | prostaglandin synthetase inhibitor |
| PHI | passive hemagglutination inhibition; past history of illness; phosphohexose isomerase; physiological... |
| Pi | parental generation; pressure in inspiration; protease inhibitor |