Jyväskylä, Central Finland, Finland
Frankfurt, Hessen, Germany
Hamburg, Hamburg, Germany
Cologne, North Rhine-Westphalia, Germany
Dortmund, North Rhine-Westphalia, Germany
Düsseldorf, Düsseldorf, Germany
Düsseldorf, North Rhine-Westphalia, Germany
Frankfurt, Hesse, Germany
Philadelphia, PA, USA
Münster, North Rhine-Westphalia, Germany
Unna, North Rhine-Westphalia, Germany
