Gregg Allman Delays Book Tour for Cardiac Testing

Gregg Allman will undergo diagnostic cardiac testing tomorrow at the Mayo Clinic's campus in Jacksonsville, Florida to determine whether he needs additional care stemming from his recent hernia operation. Allman received a liver transplant at the same facility back in 2010.

As a result of this testing, Allman will delay the publicity tour for his forthcoming memoir, My Cross to Bear. "I've been working on the book for years and am grateful for all the support I've received in putting it together," the rocker said in a statement. "As soon as doctors give me the thumbs up to go back on the road, I will be heading out onto my book tour and I can’t wait to meet all of my fans." Allman was set to appear on The Colbert Report and Piers Morgan Tonight.

Allman's summer tour with the Allman Brothers Band is not expected to be affected by this testing. The band recently sold out a run of concerts at the Beacon Theatre in Manhattan and will announce more tour dates on May 1st.

An exclusive excerpt from My Cross to Bear appears in the new issue of Rolling Stone, on newsstands Friday.