All the drugs are synthetic forms of erythropoietin, or Epo, a protein made by the kidneys that stimulates the body to produce more oxygen-carrying red blood cells.

• 所有的这些药都是促红细胞生成素或者EPO的合成形式，这是一种由肾脏产生的蛋白质，能够刺激身体产生更多的载氧血红细胞。