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Hanover, Germany. 12th Nov, 2013. Brain surgeon Madjid Samii presents the Leibniz-Ring 2013 award, issued by the Hanover Press Club, in Hanover, Germany, 12 November 2013. The Leibniz-Ring honours personalities for their outstanding achievements. Photo: Christoph Schmidt/dpa/Alamy Live News

Hanover, Germany. 12th Nov, 2013. Brain surgeon Madjid Samii carries the Leibniz-Ring 2013 award on his finger, issued by the Hanover Press Club, in Hanover, Germany, 12 November 2013. The Leibniz-Ring honours personalities for their outstanding achievements. Photo: Christoph Schmidt/dpa/Alamy Live News

Hanover, Germany. 12th Nov, 2013. Former German Chancellor Gerhard Schroeder (SPD, R) awards brain surgeon Madjid Samii (L), with the Leibniz-Ring 2013, issued by the Hanover Press Club in Hanover, Germany, 12 November 2013. The Leibniz-Ring honours personalities for their outstanding achievements. Photo: Christoph Schmidt/dpa/Alamy Live News

Hanover, Germany. 12th Nov, 2013. Former German Chancellor Gerhard Schroeder (SPD, 2nd R) awards brain surgeon Madjid Samii (2nd L), in attendance of news anchorman Jan Hofer (R, back), with the Leibniz-Ring 2013, issued by the Hanover Press Club in Hanover, Germany, 12 November 2013. The Leibniz-Ring honours personalities for their outstanding achievements. Photo: Christoph Schmidt/dpa/Alamy Live News

Hanover, Germany. 12th Nov, 2013. Former German Chancellor Gerhard Schroeder (SPD, 2nd R) awards brain surgeon Madjid Samii (2nd L), in attendance of news anchorman Jan Hofer (R, back), with the Leibniz-Ring 2013, issued by the Hanover Press Club in Hanover, Germany, 12 November 2013. The Leibniz-Ring honours personalities for their outstanding achievements. Photo: Christoph Schmidt/dpa/Alamy Live News

Hanover, Germany. 12th Nov, 2013. Former German Chancellor Gerhard Schroeder (SPD, 3rd L) awards brain surgeon Madjid Samii (2nd L), in attendance of news anchorman Jan Hofer (R) and Lower Saxony's Premier Stephan Weil (SPD, 2nd R), with the Leibniz-Ring 2013, issued by the Hanover Press Club, in Hanover, Germany, 12 November 2013. The Leibniz-Ring honours personalities for their outstanding achievements. Photo: Christoph Schmidt/dpa/Alamy Live News

Hanover, Germany. 12th Nov, 2013. Former German Chancellor Gerhard Schroeder (SPD, 2nd L) awards brain surgeon Madjid Samii (L), in attendance of news anchorman Jan Hofer (R) and Lower Saxony's Premier Stephan Weil (SPD, 2nd R), with the Leibniz-Ring 2013, issued by the Hanover Press Club, in Hanover, Germany, 12 November 2013. The Leibniz-Ring honours personalities for their outstanding achievements. Photo: Christoph Schmidt/dpa/Alamy Live News