In 1932, Spemann nominated Hamburger for a Rockefeller Foundation Fellowship to the laboratory of Frank Rattray Lillie (1870-1947) at the University of Chicago. The specific project was to learn how to apply the tissue transplantation technique from amphibians to the chick embryo, the model organism used in Lillie’s lab. Hamburger accepted, despite the fact that it meant leaving his wife and young daughter (Doris, age 3) behind in Germany. The opportunity was too enticing to turn down.
Allen, Garland, Dletrich, Michael, Huber, Florian. 2016. "Victor Hamburger and Experimental Embryology." MBL History Project digital exhibit. http://history.archives.mbl.edu/exploring/exhibits/viktor-hamburger-and-experimental-embryology