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AC/DC guitarist Malcolm Young is bowing out.  A message on the band's website says Malcolm will not be returning to the legendary heavy metal band he co-founded with his brother Angus Young because of his health situation. 

Malcolm has been battling serious health issues for several months now, although the nature of his illness has not been disclosed.  

AC/DC says Malcolm's nephew Stevie Young will replace his uncle on guitar when the band heads out on a world tour next year.  Stevie also plays rhythm guitar on  AC/DC's new album Rock or Bust, due out in late November.  It's the band's first new album of original material since 2008's Black Ice.

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