Original sentence: In October 2007, Republican presidential front-runner Rudy Giuliani's health care advisor, Canadian psychiatrist and Manhattan Institute senior fellow David Gratzer—identified as the source of cancer "survival rate" statistics cited by Rudy Giuliani in his 2008 bid for the Republican presidential nomination.The Washington Post and FactCheck.for which "you would get an F in epidemiology.org consulted cancer experts and statisticians who disputed the findings as Gratzer's claims and called calculations such as those by Goodman, Gratzer, O'Neill, and McCaughey "complete nonsense" and "a very dangerous thing to do".—cited the NCPA's Goodman and McCaughey's NCPA Brief Analysis as other experts using his method of calculating "survival rates" from cancer mortality and incidence statistics