1. Analytical GTC-EUR; SABIC; Plasticslaan 1 Bergen op Zoom 4612CX The Netherlands
2. Centre de Recherche de Solaize; Total Marketing Services; Chemin du Canal-BP 22 Solaize 69360 France
3. Department of Chemistry, Organic & Biological Analytical Chemistry Group; University of Liège; Allée du 6 aout, B6c Liège (Sart Tilman) B-4000 Belgium
4. JEOL USA; 11 Dearborn Road Peabody MA 01960 USA