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WORCESTER, UNITED KINGDOM - FEBRUARY 11: Jason Robinson of Sale lies on the ground after suffering a concussion during the Guinness Premiership match between Worcester Warriors and Sale Sharks at Sixways on February 11, 2006 in Worcester, England. (Photo by Warren Little/Getty Images)

WORCESTER, UNITED KINGDOM - FEBRUARY 11:  Jason Robinson of Sale lies on the ground after suffering a concussion during the Guinness Premiership match between Worcester Warriors and Sale Sharks at Sixways on February 11, 2006 in Worcester, England.  (Photo by Warren Little/Getty Images)