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Description: Are you on Twitter this morning? Some hospitals are. More than 100 U.S. hospitals tweet, according to one estimate. They are using the social networking tool to teach and share information about operations, even while the patient is undergoing the procedure, "GMA's" Kate Snow reports.
Keywords: twitter, social networking, knee replacment surgery, tweet, tweetin, mayo clinic, doctors, treatment, cutting edge, healthcare, medicine, gma, kate snow, youtube, facebook, teaching, student, learning, education, good morning america, morning news