| ESPA | electrical stimulation-produced analgesia |
|---|---|
| IPA | immunoperoxidase assay; incontinentia pigmenti achromians; independent physician or practice associa... |
| OA | obstructive apnea; occipital artery; occipito-anterior; occiput anterior; octanoic acid; ocular albi... |
| PCA | para-chloramphetamine; parietal cell antibody; passive cutaneous anaphylaxis; patient care assistant... |
| SIA | serum inhibitory activity; stress-induced analgesia; stress-induced anesthesia; subacute infectious ... |