1. RIC Group, President Kennedypark 26, B-8500 Kortrijk, Belgium
2. Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
3. Agilent Technologies, Hewlett-Packard Strasse 8, D-76337 Waldbronn, Germany