Departement d Anatomie et de Cytologie Pathologiques et Histologie,Faculte Libre de Medicine, Universite Catholique de Lille, France 1-30/09/1998
Center of Anatomy,University of Cologne, Germany 1/03/2005 εως 31/08/2005
Wolfson Center for Age Related Diseases, Guy's campus, King's College
London 16/10/2006 εως 11/12/2006