| DDR | diastolic descent rate; Diploma in Diagnostic Radiology |
|---|---|
| DREF | dose rate effectiveness factor |
| EFR | effective filtration rate |
| EPR | early progressive resistance; electron paramagnetic resonance; electronic patient record; electrophr... |
| ER | efficiency ratio; epigastric region; ejection rate; electroresection; emergency room; endoplasmic re... |