Mario R. Capecchi 
USA  
University of Utah
Salt Lake City, UT, USA;  
Howard Hughes Medical Institute 
b. 1937 (in Italy)
Sir Martin J. Evans 
United Kingdom 
Cardiff University, Cardiff, United Kingdom 
 b. 1941 
Oliver Smithies 
USA
University of North Carolina at Chapel Hill 
Chapel Hill, NC, USA 
b. 1925 (in United Kingdom)