| APLA, aPLA | antiphospholipid antibody |
|---|---|
| APS | adenosine phosphosulfate; American Pain Society; American Pediatric Society; American Physiological ... |
| ARA | Academy of Rehabilitative Audiometry; acetylene reduction activity; American Rheumatism Association;... |
| ASA | acetylsalicylic acid; active systemic anaphylaxis; Adams-Stokes attack; American Society of Anesthes... |
| ASMA | antismooth muscle antibody |