1. Institute for Organic Chemistry and Biochemistry, Technische Universität Darmstadt, Alarich-Weiss-Strasse 4, D-64287 Darmstadt, Germany
2. Ferring Darmstadt Labs, Alarich-Weiss-Strasse 4, D-64287 Darmstadt, Germany
3. Ferring International Center S.A., Chemin de la Vergognausaz 50, CH-1162 Saint-Prex, Switzerland