1. Reproductive Biology and Medicine Branch (T.K., T.I., N.K., S.R., G.P.C.), Bethesda, Maryland 20892
2. National Institute of Child Health and Human Development and Laboratory of Neurochemistry (N.D.A., S.K., Y.-L.Z., H.C.P.), National Institute of Neurological Disorders and Stroke, Bethesda, Maryland 20892
3. Microarray Facility (Y.W., A.P., E.K.), Advanced Technology Center, National Cancer Institute, Gaithersburg, Maryland 20877
4. Department of Microbiology and Urology (M.J.G.), New York University Cancer Institute, New York University School of Medicine, New York, New York 10016
5. First Department of Pediatrics (G.P.C.), Athens University Medical School, 11527 Athens, Greece