| BRR | Bannayan-Riley-Ruvalcaba [syndrome]; baroreceptor reflex response; breathing reserve ratio |
|---|---|
| BUN/CR | blood urea nitrogen/creatine ratio |
| C/D | cigarettes per day; cup to disc ratio |
| CDR | calcium-dependent regulator; clinical dementia rating; complementary determining region; computerize... |
| CFR | case-fatality ratio; citrovorum-factor rescue; Code of Federal Regulations; complement-fixation reac... |