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Sweden's Princess Madeleine (L) and Nobel Chemistry Prize 2015 co-winner US Paul Modrich attend the 2015 Nobel Banquet at the Stockholm City Hall on December 10, 2015. AFP PHOTO / SOREN ANDERSSON / AFP / SOREN ANDERSSON (Photo credit should read SOREN ANDERSSON/AFP/Getty Images)

Sweden's Princess Madeleine (L) and Nobel Chemistry Prize 2015 co-winner US Paul Modrich attend the 2015 Nobel Banquet at the Stockholm City Hall on December 10, 2015.   AFP PHOTO / SOREN ANDERSSON / AFP / SOREN ANDERSSON        (Photo credit should read SOREN ANDERSSON/AFP/Getty Images)