| HAA | hearing aid amplifier; hemolytic anemia antigen; hepatitis-associated antigen; hospital activity ana... |
|---|---|
| HNA | heparin neutralizing activity |
| HRA | health record analyst; health risk appraisal; heart rate audiometry; hereditary renal adysplasia; hi... |
| HUAA | home uterine activity assessment |
| IAT | instillation abortion time; iodine azide test; invasive activity test |