Filtering by: Committee Flanders, W Dana, Emory University Remove constraint Committee: Flanders, W Dana, Emory University Committee Howards, Penelope, Emory University Remove constraint Committee: Howards, Penelope, Emory University Department Epidemiology Remove constraint Department: Epidemiology Keyword neural tube defects Remove constraint Keyword: neural tube defects Submission Type Dissertation Remove constraint Submission Type: Dissertation