3History of cancer. Wikipedia, the free encyclopedia. http ://en.wikipedia. org/wiki/History_of_cancer.
4Yang Yang. Who were the most overrated winners of the No- bel Prize in Medicine? http://www, quora.com/Who-were-the- most -overrated -winners - of- the - Nobel - Prize - in - Medicine Peyton Rous Biographical. NobelPrize.Org.