| AA | abdominal aorta; acetic acid; achievement age; active alcoholic; active assistive [range of motion];... |
|---|---|
| AAA | abdominal aortic aneurysm/aneurysmectomy; acne-associated arthritis; acquired aplastic anemia; acute... |
| AIF | anemia-inducing factor; anti-inflammatory; anti-invasion factor |
| AIHA | American Industrial Hygiene Association; autoimmune hemolytic anemia |
| AISA | acquired idiopathic sideroblastic anemia |