Age-bridging among young, urban, heterosexual males with asymptomatic Chlamydia trachomatis. Running Title: Age-bridging among young, urban males

1 Division of General Pediatrics and Adolescent Medicine, Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA. 2 Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA. 3 STI Control Program, Denver Public Health Department, Denver, CO, USA. 4 Division of Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA. 5 Departments of Medicine and Preventive Medicine and Biometrics, University of Colorado at Denver and Health Sciences Center, Denver, CO, USA.