| AIHA | Auto-Immune Hemolytic Anemia |
|---|---|
| AES | acetone-extracted serum; American Electroencephalographic Society; American Encephalographic Society... |
| ARIS | auto-regulated inspiratory support |
| AS | acetylstrophanthidin; acidified serum; acoustic schwannoma; acoustic stimulation; active sarcoidosis... |
| Auto-PEEP | self-controlled positive end-expiratory pressure |