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NORTHAMPTON, ENGLAND - MARCH 27: George North of Northampton Saints lies injured after scoring a try and after colliding with Nathan Hughes of Wasps during the Aviva Premiership match between Northampton Saints and Wasps at Franklin's Gardens on March 27, 2015 in Northampton, England. (Photo by Tony Marshall/Getty Images)

NORTHAMPTON, ENGLAND - MARCH 27:  George North  of Northampton Saints lies injured after scoring a try and after colliding with Nathan Hughes of Wasps during the Aviva Premiership match between Northampton Saints and Wasps at Franklin's Gardens on March 27, 2015 in Northampton, England.  (Photo by Tony Marshall/Getty Images)