EXHIBIT 23.3 [PricewaterhouseCoopers Logo] PricewaterhouseCoopers S.A. 268 Kifissias Avenue 152 32 Halandri Greece www.pricewaterhousecoopers.gr e-mail: pwc.greece@pwcglobal.com Tel.: 30-210-6874 400 Fax: 30-210-8674 444 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We hereby consent to the use in this Registration Statement on Form F-1 of our report dated May 11, 2005 relating to the consolidated financial statements, which appear in such Registration Statement. We also consent to the reference to us under the heading "Experts" in such Registration Statement. /s/ PricewaterhouseCoopers - -------------------------- PricewaterhouseCoopers SA Athens, Greece May 11, 2005