Before revision: Leonard Hayflick ( born 20 May 1928 ) was a Professor of Anatomy at the UCSF School of Medicine, and was Professor of Medical Microbiology at Stanford University School of Medicine.
After revision: Leonard Hayflick ( May 20, 1928 – August 3, 2024) was an American anatomist who was Professor of Anatomy at the UCSF School of Medicine, and was Professor of Medical Microbiology at Stanford University School of Medicine.