| APA | action potential amplitude; aldosterone-producing adenoma; Ambulatory Pediatric Association; America... |
|---|---|
| AAP | air at atmospheric pressure; American Academy of Pediatrics; American Academy of Pedodontics; Americ... |
| IPA | immunoperoxidase assay; incontinentia pigmenti achromians; independent physician or practice associa... |
| ISIS | image selected in vivo spectroscopy; imaging science and information system; information system-imag... |
| ADA | adenosine deaminase; American Dental Association; American Dermatological Association; American Diab... |