| GSoA | Gerontological Society of America |
|---|---|
| HCA | heart cell aggregate; hepatocellular adenoma; home care aide; Hospital Corporation of America; hydro... |
| HIAA | Health Insurance Association of America |
| IDSA | Infectious Disease Society of America |
| ISA | Instrument Society of America; intracarotid sodium amytal; intrinsic simulating activity; intrinsic ... |