Head of the Institute of International Finance (IIF) Charles Dallara arrives for a meeting with Greek Prime minister Lucas Papademos in Athens January 26, 2012. Greece's tortuous negotiations over a debt swap with private creditors honed in on Thursday on demands that the European Central Bank contribute to a deal to bring Athens' messy finances back on track. REUTERS/Yiorgos Karahalis (GREECE - Tags: POLITICS BUSINESS)