University of California, Berkeley,the U.S.A

Universityof Pennsylvania,the U.S.A

University of Wisconsin Madison,the U.S.A

Cornell University,the U.S.A

Universiteit Maastricht, the Netherlands

University of Rennes, France

University of Luxembourg, Luxembourg

      University of Hong Kong

      City University of Hong Kong

      Lingnan University, Hong Kong

      Taipei University

Université de Lausanne