| ER | efficiency ratio; epigastric region; ejection rate; electroresection; emergency room; endoplasmic re... |
|---|---|
| INREM | internal roentgen-equivalent, man |
| RAD | radial artery catheter; radiation absorbed dose; radical; radiography or radiographic; reactive airw... |
| REB | roentgen-equivalent biological |
| REM | rapid eye movement; recent-event memory; reticular erythematous mucinosis; return electrode monitor;... |