| EOR | European Organization for Research; exclusive operating room |
|---|---|
| EORTC | European Organization for Research and Treatment of Cancer |
| EPO | eosinophil peroxidase; erythropoiesis; erythropoietin; evening primrose-oil; exclusive provider orga... |
| HCO | health care organization |
| HIO | health insuring organization; hypoiodism |