1. Pharmaceutical Biochemistry and Bioanalytics, Pharmaceutical Institute, University of Bonn, An der Immenbeurg 4, Bonn 53121, Germany
2. Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, California 92093, United States
3. Department of Chemistry and Biochemistry, The Ohio State University, 578 Biological Sciences Building, 484 W 12th Avenue, Columbus, Ohio 43210, United States
4. Institute of Pharmacology Toxicology and Pharmacy, Veterinary Faculty, Ludwig Maximilian University of Munich, Königinstr. 16, Munich 80539, Germany
5. Department of Medicine, University of California San Diego, La Jolla, California 92093, United States