1. Division of Preventive Medicine, Department of Medicine, School of Medicine, University of Alabama at Birmingham, 1720 2nd Avenue South, Birmingham, AL 35294, USA
2. Department of Epidemiology and Prevention, Wake Forest School of Medicine, Wake Forest Baptist Medical Center, Winston Salem, NC 27157, USA
3. Department of Nursing, School of Nursing, University of Alabama at Birmingham, Birmingham, AL 35294, USA
4. Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA