EXHIBIT 24

                                POWER OF ATTORNEY



                         For Executing Forms 3, 4, and 5



         The undersigned hereby appoints each of David C. Dvorak,

R. Bruce Phillips, Chad F. Phipps, and Dennis J. Kline, signing singly, as true

and lawful attorney-in-fact to:



(1) execute for and on behalf of the undersigned, Forms 3, 4, and 5

    and any amendments to previously filed forms in accordance with

    Section 16(a) of the Securities Exchange Act of 1934 and the rules

    thereunder;



(2) do and perform any and all acts for and on behalf of the

    undersigned which may be necessary or desirable to complete the

    execution of any such Forms 3, 4, or 5 and the timely filing of

    such form with the United States Securities and Exchange

    Commission and any other authority; and



(3) take any other action of any type whatsoever in connection with

    the foregoing which, in the opinion of such attorney-in-fact, may

    be of benefit to, in the best interest of, or legally required by,

    the undersigned, it being understood that the documents executed

    by such attorney-in-fact on behalf of the undersigned pursuant to

    this Power of Attorney shall be in such form and shall contain

    such terms and conditions as such attorney-in-fact may approve in

    his discretion.



         The undersigned hereby grants to each such attorney-in-fact full power

and authority to do and perform all and every act and thing whatsoever

requisite, necessary and proper to be done in the exercise of any of the rights

and powers herein granted, as fully to all intents and purposes as such

attorney-in-fact might or could do if personally present, with full power of

substitution or revocation, hereby ratifying and confirming all that such

attorney-in-fact, or his substitute or substitutes, shall lawfully do or cause

to be done by virtue of this power of attorney and the rights and powers herein

granted. The undersigned 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

Securities Exchange Act of 1934.



         IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney

to be executed as of this 8th day of October, 2003.







                                     /s/David K. Floyd

                                     -----------------------------------------

                                     Signature





                                     David K. Floyd

                                    -----------------------------------------

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