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Attorneys Peter Vaira, left and William Murray, center, who represent Dr. Gary Kao, right, prepare for the United States Senate Committee of Veterans Affairs field hearings chaired by Sen. Arlen Specter, D-PA, at the Philadelphia Veterans Hospital Monday, June 29, 2009, in Philadelphia. Kao a University of Pennsylvania radiation oncologist is at the center of the controversy about the Philadelphia VA Medical Center's prostate cancer program.  (AP Photo/Bradley C Bower)