The success of insulin enabled the company to attract well-respected scientists and, with them, make more medical advances. By its fiftieth anniversary in 1926 sales reached $9 million and the company produced more than 2,800 different items. In 1928 Lilly introduced Liver Extract 343 for the treatment of pernicious anemia, a blood disorder, in a joint venture with two Harvard University scientists, George R. Minot and William P. Murphy. In 1930 Lilly introduced Liver Extract No. 55 in collaboration with George Whipple, a University of Rochester scientist. Minot, Murphy, and Whipple won the 1934 Nobel Prize in medicine for their research.