1. Klinikum Rechts der Isar; Institute of General Practice; Orleansstrasse 47 München Germany 81667
2. University of Wisconsin - Madison; Department of Family Medicine; 777 South Mills Madison Wisconsin USA WI 53715
3. University of Arizona; Arizona Center for Integrative Medicine; PO Box 245153 Tucson Arizona USA 85724
4. Karl-Franzens-University; Institute of Pharmaceutical Sciences, Department of Pharmacognosy; Universitätsplatz 4 Graz Austria A-8010