| ISR | information storage and retrieval; Institute for Sex Research; Institute of Surgical Research; insul... |
|---|---|
| IVS | inappropriate vasopressin secretion; intervening sequence; interventricular septum; intervillous spa... |
| PIRS | plasma immunoreactive secretion |
| PS | pacemaker syndrome; paired stimulation; paradoxical sleep; paraspinal; parasympathetic; Parkinson sy... |
| PTHS | parathyroid hormone secretion [rate] |