University of Barcelona
Barcelona, Spain

Babeș-Bolyai University
Cluj-Napoca, Romania

University of Sheffield
Sheffield, United Kingdom

University of Barcelona
Barcelona, Spain

Universidad Autonoma de Madrid
Madrid, Spain

University of Oslo
Oslo, Norway

University of Seville
Seville, Spain

TU Dortmund University
Dortmund, Germany

University of Valencia
Valencia, Spain

University of Barcelona
Barcelona, Spain

University of Valencia
Valencia, Spain

Universitat Rovira i Virgili
Tarragona, Spain

Czech Academy of Sciences
Prague, Czech Republic

University of Murcia
Murcia, Spain

Aristotle University of Thessaloniki
Thessaloniki, Greece

Friedrich-Alexander-Universität Erlangen-Nürnberg
Erlangen-Nürnberg, Germany

University of Valencia
Valencia, Spain

Open University of the Netherlands
Heerlen, The Netherlands