| PHT | phenytoin; portal hypertension; primary hyperthyroidism; pulmonary hypertension |
|---|---|
| PICD | primary irritant contact dermatitis |
| PIDS | primary immunodeficiency syn-drome |
| PII | plasma inorganic iodine; primary irritation index |
| PIS | preinfarction syndrome; primary immunodeficiency syndrome; Provisional International Standard |