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Associated Press
FILE - In this Nov. 9, 2011 file photo, singer Gregg Allman arrives at the 45th Annual CMA Awards in Nashville, Tenn. Rock and Roll Hall of Fame member Gregg Allman is delaying his upcoming book tour for heart tests. Allman is scheduled to undergo tests Friday at The Mayo Clinic in Jacksonville, Fla., the same facility where he underwent a liver transplant in June 2010. (AP Photo/Evan Agostini, file)

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