Karl Landsteiner ("tuberculinum prestinum"). He also published a number of papers, five of them being published in Dutch by the Royal Academy of Sciences. Yet working conditions proved to be not much better than in post-war Vienna. So Landsteiner accepted the invitation that reached him from New York, initiated by Simon Flexner, who was familiar with Landsteiner's work, to work for the Rockefeller Institute. He arrived there with his family in the spring of 1923. Throughout the 1920s Landsteiner worked on the problems of immunity and allergy. In 1927 he discovered new blood groups: M, N and P, refining the work he
Nobel Prize controversies for this line of research. "Encyclopædia Britannica"'s guide to Nobel Prizes in cancer research mentions Yamagiwa's work as a milestone without mentioning Fibiger. The 1923 prize was awarded to Frederick Banting and John Macleod "for the discovery of insulin". Banting clearly deserved the prize, however, the choice of Macleod as co-winner was controversial. Banting felt that Charles Best was the proper corecipient, while Macleod had merely given them lab space at the University of Toronto while Macleod was away for the summer. However, on his return, Macleod pointed out some flaws in their experimental design and gave them advice about