| ANuA | antinuclear antibody |
|---|---|
| APAB | antiphospholipid antibody |
| 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;... |