1. Department of Public Health Sciences, University of Connecticut School of Medicine, Farmington, CT 06030, USA
2. Virginia Polytechnic Institute, State University, Blacksburg, VA 24061, USA
3. Department of Internal Medicine, Yale School of Medicine, New Haven, CT 06510, USA
4. Department of Social and Behavioral Sciences, Yale School of Public Health, New Haven, CT 06510, USA
5. Departments of Urology and Obstetrics, Gynecology & Reproductive Services, Yale School of Medicine, New Haven, CT 06510, USA