POWER OF ATTORNEY
                 (For executing Forms 3, 4 and 5 under Rule 16)



         KNOW ALL BY  THESE  PRESENTS,  That the  undersigned  hereby
constitutes  and  appoints  F.  DeanCopeland,   Susan  N.  Roth,
Christopher   A.  Parrott,   or  Jo  C.  Dearing  as  his  true  and  lawful
attorneys-in-fact and agents to:

      a.   Execute for and on behalf of the undersigned such Forms 3, 4 and 5
           ("Forms") as may be required from time to time by Section 16 of the
           Securities Exchange Act of 1934 and the applicable rules thereunder
           ("Act"); and

      b.   Do and perform each and every act and thing for and on behalf of the
           undersigned which may be necessary or desirable to complete the
           execution and timely filing of such Forms as undersigned may be
           required to file with the Securities and Exchange Commission and any
           other authority.

         The undersigned grants said attorneys-in-fact and agents full power
and authority to act and perform on behalf of the undersigned all and every act
and thing whatsoever required to be done in the exercise of the rights and
powers granted herein, as fully to all intents and purposes as said
attorneys-in fact and agents might or could do in person, with full power of
substitution orrevocation, hereby ratifying and confirming all that such
attorneys-in-fact andagents, or their substitutes, may lawfully do or cause to
be done by virtuehereof. The undersigned hereby acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming any of the undersigned's responsibilities to
comply with Section 16 of the Act.


         IN WITNESS WHEREOF, the undersigned has executed this Power of
Attorney this 15th day of September , 2005.



                                             ---------------------------------
                                                     Charles L. Glick





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