| PASA | para-aminosalicylic acid; primary acquired sideroblastic anemia; proximal articular set angle |
|---|---|
| PDA | patent ductus arteriosus; personal digital assistant; posterior descending artery; pulmonary disease... |
| RA | radioactive; ragocyte; ragweed antigen; rapidly adapting [receptors]; reactive arthritis; reciprocal... |
| RAEB | refractory anemia with excess blasts |
| RAEBiT, RAEB-T | refractory anemia with excess blasts in transformation |