Eugene Goldwasser, who isolated and purified erythropoietin in the 1970s, has died, reports The New York Times. He was 88. It later became the basis of Amgen, and the company has made billions of dollars on the anemia drug. "It just continually delighted him that the work he did ended up having an impact on patients," Gary Toback, a colleague of Goldwasser's at the University of Chicago, tells the Times.