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© The Financial Times Ltd 2013 FT and 'Financial Times' are trademarks of The Financial Times Ltd.
Last updated: December 19, 2012 8:24 pm
By Kara Scannell in New York, Brooke Masters, Caroline Binham and Tom Burgis in London and James Shotter in Zürich
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© The Financial Times Ltd 2013 FT and ‘Financial Times’ are trademarks of The Financial Times Ltd.