EX-3 4 a2048262zex-3.txt POWER OF ATTORNEY EXHIBIT 3 POWER OF ATTORNEY Power of Attorney, dated as of February 4, 2000 for Waddell & Reed Financial Services, Inc. filed as Exhibit 3 to the Waddell & Reed Financial, Inc. 13G filed for Pharmacyclics, Inc. on January 23, 2001, Accession Number 0000912057-01-002508 and incorporated herein by reference. Power of Attorney, dated as of February 4, 2000 for Waddell & Reed, Inc. filed as Exhibit 3 to the Waddell & Reed Financial, Inc. 13G filed for Pharmacyclics, Inc. on January 23, 2001, Accession Number 0000912057-01-002508 and incorporated herein by reference. Power of Attorney, dated as of February 4, 2000 for Waddell & Reed Investment Management Company Financial Services, Inc. filed as Exhibit 3 to the Waddell & Reed Financial, Inc. 13G filed for Pharmacyclics, Inc. on January 23, 2001, Accession Number 0000912057-01-002508 and incorporated herein by reference.