EXHIBIT 3

                                POWER OF ATTORNEY

Power of Attorney, dated as of January 7, 2002 for Waddell & Reed Financial
Services, Inc. filed as Exhibit 3 to the Waddell & Reed Financial, Inc. 13G
filed for Province Healthcare Company on February 13, 2003, Accession Number
0001047469-03-0005377 and incorporated herein by reference.

Power of Attorney, dated as of January 7, 2002 for Waddell & Reed, Inc. filed
as Exhibit 3 to the Waddell & Reed Financial, Inc. 13G filed for Province
Healthcare Company on February 13, 2003, Accession Number
0001047469-03-0005377 and incorporated herein by reference.

Power of Attorney, dated as of January 7, 2002 for Waddell & Reed Investment
Management Company filed as Exhibit 3 to the Waddell & Reed Financial, Inc.
13G filed for Province Healthcare Company on February 13, 2003, Accession
Number 0001047469-03-0005377 and incorporated herein by reference.

Power of Attorney, dated as of January 21, 2003 for Waddell & Reed Ivy
Investment Company filed as Exhibit 3 to the Waddell & Reed Financial, Inc.
13G filed for Province Healthcare Company on February 13, 2003, Accession
Number 0001047469-03-0005377 and incorporated herein by reference