691
Participants
Start Date
June 30, 2011
Primary Completion Date
December 31, 2013
Study Completion Date
December 31, 2013
Vitamin D3
Subjects are told to take vitamin D daily for 6 months.
Vitamin D3
Subjects are asked to take vitamin D orally, daily for six months.
Tufts University, Boston
Office of Dietary Supplements (ODS)
NIH
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Boston University
OTHER
Boston Children's Hospital
OTHER
Tufts University
OTHER