Jülich , Nordrhein-Westfalen , Germany

Cherry Hill , New Jersey , USA

Edmonton , Alberta , Canada

Öxabäck , Vastra Gotalands , Sweden

Praha , Czech Republic

Göteborg , Vastra Gotalands , Sweden

Netherlands

Texas , USA

Berkeley , California , USA

København , Denmark

Bonn , Germany

Columbus , Ohio , USA

Sunnyvale , California , USA

Minnesota , USA

Midtjylland , Denmark

Yarmouth , Maine , USA

Aalst , Belgium

Barcelona , Spain

Quebec , Canada

Wilsonville , Oregon , USA