[1] Temple University,Department of Obstetrics and Gynecology
[2] Temple University,Department of Public Health, College of Health Professions and Social Work
[3] University of Pennsylvania School of Nursing,Department of Statistics
[4] Temple University,Vaccine and Infectious Disease Division
[5] Fred Hutchinson Cancer Research Center,Division of Allergy and Infectious Diseases, Fred Hutchinson Cancer Research Center
[6] University of Washington,undefined