| EOR | European Organization for Research; exclusive operating room |
|---|---|
| ER | efficiency ratio; epigastric region; ejection rate; electroresection; emergency room; endoplasmic re... |
| ERT | esophageal radionuclide transit; estrogen replacement therapy; examination room terminal; external r... |
| GOR | gastroesophageal reflux; general operating room |
| IHRA | isocapnic hyperventilation with room air |