1. Division of Reproductive Sciences (J.W.W., R.L.S.), Oregon National Primate Research Center, Beaverton, Oregon 97006;
2. Department of Physiology and Pharmacology (R.L.S.), Oregon Health Sciences University, Portland, Oregon 97201;
3. Molecular BioSciences Department (K.D.R.), Pacific Northwest National Laboratory, Richland, Washington 99352