| DREF | dose rate effectiveness factor |
|---|---|
| EFR | effective filtration rate |
| EIRnv | extra incidence rate of non-vaccinated groups |
| EPR | early progressive resistance; electron paramagnetic resonance; electronic patient record; electrophr... |
| ER | efficiency ratio; epigastric region; ejection rate; electroresection; emergency room; endoplasmic re... |