| AHA | acetohydroxamic acid; acquired hemolytic anemia; acute hemolytic anemia; American Heart Association;... |
|---|---|
| AHI | active hostility index; Animal Health Institute; apnea-plus-hypopnea index |
| AIBS | American Institute of Biological Sciences |
| AIH | amelogenesis imperfecta, hypomaturation type; American Institute of Homeopathy; artificial inseminat... |
| AIN | acute interstitial nephritis; American Institute of Nutrition; anterior interosseous nerve |
| NIAAA | National Institute of Alcohol Abuse and Alcoholism |
|---|---|
| NIAID | National Institute of Allergy and Infectious Disease |
| NICHD | National Institute of Child Health and Human Development |
| NIDR | National Institute of Dental Research |
| NIDA | National Institute of Drug Abuse |