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RTX18SN5,A demonstrator holds a banner before a march to the China Liaison office as they rally in support of Liu Xia (seen on banner), the wife of imprisoned Chinese dissident and Nobel Peace Prize winner Liu Xiaobo, in Hong Kong on March 7, 2014.  Liu, who has been under house arrest since 2010 but has not been charged with any crime, was admitted to hospital in Beijing with heart problems on February 20, 2014.   AFP PHOTO / Philippe Lopez        (Photo credit should read PHILIPPE LOPEZ/AFP/Getty Images) Philippe Lopez/AFP/Getty