| ABO | Three Main Blood Types |
|---|---|
| ABO | abortion; absent bed occupancy; American Board of Orthodontists; blood group system consisting of gr... |
| OAB | ABO blood group; old age benefits |
| ANF | Atrial Natriuretic Factors |
| ECF | 1) Eosinophilic Chemotatic Factors 2) Extra-Cellular Fluid; 세포 외액 |