Dr. Bohr received his M.D. in 1978, Ph.D. in 1987, and D.Sc. in 1987 from the University of Copenhagen, Denmark. After training in neurology and infectious diseases at the University Hospital in Copenhagen, Dr. Bohr did a postdoctoral fellowship with Dr. Hans Klenow at the University of Copenhagen, Denmark. He then worked with Dr. Philip Hanawalt at Stanford University as a research scholar from 1982-1986. In 1986, he joined the National Cancer Institute (NCI) as an investigator and become a tenured Senior Investigator in 1988. Dr. Bohr developed a research section on DNA repair at the NCI. In 1992, he moved to the National Institute on Aging to become Chief of the Laboratory of Molecular Genetics, renamed Laboratory of Molecular Gerontology in February 2001.