The 2009 Nobel Prize in Physiology or Medicine was awarded jointly to three scientists from University of California, Johns Hopkins University and Harvard Medical School. Which of the following statements about the Nobel Prize in Medicine is/are correct? I. The youngest Nobel Laureate in Physiology or Medicine is Frederick G. Banting, who was 32 years old when he was awarded the Prize in 1923. II. The oldest Nobel Laureate in Physiology or Medicine to date is Peyton Rous, who was 87 years old when he was awarded the Prize in 1966. III. Only one scientist has been awarded the Nobel Prize in Physiology or Medicine more than once