1. Departments of Reproductive Medicine (M.A.L., B.K.B., S.J.S., P.L.M.), San Diego, California 92093;
2. Medicine (R.T., H.Z., I.T., N.J.G.W.), San Diego, California 92093;
3. Neuroscience (P.L.M.,), San Diego, California 92093;
4. University of California San Diego Cancer Center (P.L.M., N.J.G.W.), University of California, San Diego, California 92093;
5. Medical Research Service (N.J.G.W.), Veterans Affairs San Diego Healthcare System, San Diego, California 92161