| BTSG | Brain Tumor Study Group |
|---|---|
| CAPP | Captopril Prevention Project [study] |
| CASS | cataract-alopecia-sclerodactyly syndrome; Coronary Artery Surgery Study |
| CATS | Canadian American Ticlopidine Study |
| CCG | Children's Cancer Study Group; cholecystogram, cholecystography; clinically coherent group |