1. University of Applied Sciences and Arts Northwestern Switzerland, Institute of Pharma Technology, Muttenz CH-4132, Switzerland
2. Department of Pharmaceutical Sciences, University of Basel, 4056 Basel, Switzerland
3. Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland
4. Zumbach Electronic, Hauptstrasse 93, Postfach, 2552 Orpund, Switzerland