Dr. Alexander Fleming was credited with the discovery of penicillin in 1928. Prior to being credited, Dr Alexander Fleming was called a quack for suggesting penicillin be used as a medicine. Alexander Fleming wrote, "Penicillin sat on my shelf for 12 years while I was called a quack." quoted by Jeffrey Dach from
The Oncologist, Vol. 7, Suppl 2, 58-65, June 2002 AlphaMed Press Reality Testing in Cancer Treatment: The Phase I Trial of Endostatin David P. Ryan at Massachusetts General Hospital Boston.