| ABO | abortion; absent bed occupancy; American Board of Orthodontists; blood group system consisting of gr... |
|---|---|
| ACCESS | Ambulatory Care Clinic Effectiveness Systems Study; automated cervical cell screening system |
| ACS | acrocallosal syndrome; acrocephalosyndactyly; acute chest syndrome; acute confusional state; Alcon C... |
| ADFS | alternative delivery and financing system |
| ADS | acute death syndrome; acute diarrheal syndrome; Alcohol Dependence Scale; alternative delivery syste... |