1. Laval University, Quebec, Canada. Collaborator: O. Barbier

2. University of Larissa, Greece. Collaborator: D.Bogdanos, E.Rigopoulou

3. Saaraland University, Homburg, Germany, Collaborators: F.Lammert, M.Krawczyk

4. University of Oslo, Norway. Collaborator: T. Karlsen, M. Vesterhus

5. University of Navarra, Collaborator: M.A. Avila

6. University of the Basque Country, Collaborator: J. M. Banales

7. University of Erlangen, Germany. Collaborator: A. Kremer

8. Inova Diagnostic, San Diego, US. Collaborators: G.Norman, Z. Shums

9. Institute of Biotechnology, Brandenburg University of Technology Cottbus-Senftenberg,

     Germany. Collaborator: D. Roggenbuck