Michael Moore, whose documentary Sicko, attacks the U.S. health care and health insurance systems, defended the film against a recent attack by CNN medical correspondent Sanjay Gupta on CNN's Larry King Live Tuesday night. Moore said that his staffers sent Gupta an email message backing up claims made in the movie that Gupta questioned in an earlier broadcast -- but that Gupta ignored the message. Gupta denied Moore's charges, accusing the filmmaker of "cherry-picking data from different reports." In the end, however, Gupta acknowledged that overall the movie "strikes at the irrefutable fact -- [the U.S. health system] is broken." Gupta, who continues to practice medicine, was asked by Moore whether he himself didn't find the current health-insurance system cumbersome. The surgeon replied, "It's a shameful system, especially when I'm dealing with some of my patients." Moore's film is due to expand into 756 theaters on Friday.