Affiliation: | 1. VA Nebraska-Western Iowa Health Care System, University of Nebraska Medical Center, Omaha, Neb;2. Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Neb;3. Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Neb;4. Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, Neb |