Professor Hirsch received his MD and PhD from the University of Copenhagen, Denmark. After training in pathology and medical oncology in Copenhagen, he served from 1996–1999 as chief physician (“overlaege”) at the Department of Oncology of the Finsen Center, Rigshospitalet in Copenhagen. From 1999–2002 he was Visiting Professor at the University of Colorado Cancer Center and since 2012 Professor of Medicine and from 2004 also Professor of Pathology at the University of Colorado. Professor Hirsch has extensive teaching experience and has been a supervisor for many European and Asian post-doctoral trainees in his lab at the University of Colorado Cancer Center.