| NCCLS | National Committee for Clinical Laboratory Standards |
|---|---|
| NISO | National Information Standards Organization |
| AHA | acetohydroxamic acid; acquired hemolytic anemia; acute hemolytic anemia; American Heart Association;... |
| NCA | National Certification Agency; National Council on Aging; National Council on Alcoholism; neurocircu... |
| NHA | National Health Association; National Hearing Association; National Hemophilia Association; nonspeci... |