| IHS | 1) International Headache Society 2) Intelligent Hospital System |
|---|---|
| AAS | Aarskog-Scott [syndrome]; acid aspiration syndrome; alcoholic abstinence syndrome; American Academy ... |
| ACMS | American Chinese Medical Society |
| ADDS | American Digestive Disease Society |
| AFS | acquired or adult Fanconi syndrome; alternative financing system; American Fertility Society; antifi... |