1. Gottfried Keller Strasse 8, D-86720 Nördlingen, Germany
2. Department of Clinical Pharmacy and Diagnostics, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria
3. Kurt Kitzing GmbH, Hinterm Alten Schloss 21, D-86757 Wallerstein, Germany
4. Department of Microbiology, University of Food Technologies, 26 Maritza Boulevard, 4002 Plovdiv, Bulgaria
5. Department of Essential Oils, University of Food Technologies, 26 Maritza Boulevard, 4002 Plovdiv, Bulgaria
6. Shimadzu Germany, Department of GC and GC-MS, Albert-Hahn-Strasse 6-10, D-47269 Duisburg, Germany