Filtering by: Committee Allen, Susan A, Emory University Remove constraint Committee: Allen, Susan A, Emory University Committee Stephenson, Robert, Emory University Remove constraint Committee: Stephenson, Robert, Emory University Degree PhD Remove constraint Degree: PhD Year 2012 Remove constraint Year: 2012 Research Field Health Sciences, Epidemiology Remove constraint Research Field: Health Sciences, Epidemiology Submission Type Dissertation Remove constraint Submission Type: Dissertation