Karolinska Institute's Chairman of the Nobel committee for physiology or medicine Juleen Zierath talks, as images of James Rothman and Randy Schekman, of the US, and German-born researcher Thomas Suedhof are projected on a screen, in Stockholm, Sweden, Monday, Oct. 7, 2013, as they are announced as the winners of the 2013 Nobel Prize in medicine. (AP)
{}