1. Institute of Anatomy and Cell Biology (D.M., M.P., R.M.), Justus-Liebig-University, 35385 Giessen, Germany
2. Institute for Hormone and Fertility Research (D.M., L.C.-D., L.T.B., B.B.-S., A.K.M.), University of Hamburg, 20251 Hamburg, Germany
3. Department of Pharmacology (R.C.S.), University of Mississippi, University, Mississippi 38677