1. Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, 9000 Ghent, Belgium
2. Bender Analytical Holding BV, Oude Holleweg 6, 6572 AB Berg en Dal, The Netherlands
3. Department of Pharmaceutics, Ghent University, B-9000 Ghent, Belgium