The following abstracts will be presented: [1650.4] Results of NICHD Two-Site Maternal Vitamin D Supplementation Randomized Controlled Trial during Lactation Carol L. Wagner, Cynthia R. Howard, Thomas C. Hulsey, Myla Ebeling, Judy R. Shary, Pamela G. Smith, Cynthia Childs, Martha Murphy, Sarah N. Taylor, Ruth A. Lawrence, Bruce W. Hollis. Pediatrics, Medical Univ of SC, Charleston, SC; Pediatrics, Univ of Rochester, Rochester, NY. BACKGROUND: AAP recommends all breastfed (BrF) infants rece...