| R1, R2, R3, etc. | years of resident study |
|---|---|
| RAI | radioactive iodine; radioactive isotope; resident assessment instrument; resting ankle index; right ... |
| RAN | resident's admission notes |
| RAP | recurrent abdominal pain; regression-associated protein; renal artery pressure; resident assessment ... |
| res | research; resection; resident; residue; resistance |