NEW YORK (Reuters) - Three New York doctors were charged on Thursday with giving large amounts of Viagra and other anti-impotence drugs to mob members in return for construction and auto repair work done by mafia-controlled businesses. Arlen Fleisher, Stephen Klass and George Shapiro, all doctors in Westchester County, a suburban area north of New York City, were accused of trading prescription drugs and drug samples with members and associates of the Gambino crime family. The one-count complaint was filed in Manhattan federal court. Lawyers for all three defendants said their clients denied wrongdoing. If convicted, the men could face...