Groningen, Groningen, Netherlands
Toulouse, Midi-Pyrenees, France
Nizhnij Novgorod, Nizhegorodskaya oblast', Russian Federation
Warsaw, Mazovia, Poland
Lund, Skane, Sweden
Shanghai, Shanghai, China
Strasbourg, Alsace, France
Frankfurt, Hesse, Germany
Rotterdam, Zuid-Holland, Netherlands
San Francisco, California, United States
Hamburg, Hamburg, Germany
