1. Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee WI 53226, USA.
2. Computational Chemistry and Biology, Global Research & Development, Discovery Technologies, Merck Healthcare, Frankfurter Str. 250, 64293 Darmstadt, Germany.
3. Department of Pharmacology, University of Minnesota Medical School, 312 Church Street, Minneapolis, MN 55455, USA.
4. Central Process Development - Downstream Processing Services, Merck Performance Materials, Frankfurter Street 250, 64293 Darmstadt, Germany.
5. Global Health Institute of Merck, Ares Trading S.A., a subsidiary of Merck KGaA, Darmstadt, Germany, 1262 Eysins, Switzerland.