University at Albany (SUNY), Albany, NY, USA

University of Barcelona, Barcelona, Spain

La Trobe University, Melbourne, Australia

University of Leicester, Leicester, UK

University of Bergamo, Bergamo, Italy

Max Planck Institute for Mathematics in the Sciences, Leipzig, Germany

Università degli Studi di Perugia, Perugia, Italy

Technion-Israel Institute of Technology, Haifa, Israel

Università di Palermo, Italy