190
Participants
Start Date
December 31, 2011
Primary Completion Date
August 31, 2016
Study Completion Date
August 31, 2016
Vitamin D control dose
18,000 IU per month
Vitamin D supplementation-
60,000 IU per month(medium dose) or 120,000 IU/month(high dose)
Emory Children's Center, Atlanta
University Hospitals Case Medical Center, Cleveland
Emory University
OTHER
University Hospitals Cleveland Medical Center
OTHER