| 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] |
| Se | secretion; selenium |