Date: April 29, 2008

                          POWER OF ATTORNEY

Know all men by these presents that the undersigned does hereby make, constitute
and appoint John M. Franck II and Natalie H. Cline or either one of them, as a
true and lawful attorney-in-fact of the undersigned with full powers of
substitution and revocation, for and in the name, place and stead of the
undersigned (both in the undersigned's individual capacity and as a member of
any limited liability company or as a partner of any partnership for which the
undersigned is otherwise authorized to sign), to execute and deliver such forms
as may be required to be filed from time to time with the Securities and
Exchange Commission with respect to: (i) Sections 13(d) and 16(a) of the
Securities Exchange Act of 1934, as amended (the "Act"), including without
limitation, Schedule 13D, Schedule 13G, statements on Form 3, Form 4 and Form 5
and (ii) in connection with any application for EDGAR access codes, including
without limitation the Form ID.


                                         FRISCO PARTNERS
                                         By: /s/ Thomas F. Frist, Jr.
                                         Name: Thomas F. Frist, Jr.
                                         Title: Partner