58
Participants
Start Date
July 31, 2011
Primary Completion Date
June 30, 2013
Study Completion Date
February 28, 2017
Vitamin D3
7000IU per day of vitamin D3 for 12 months.
Placebo
Once a day for 12 months.
Children's Hospital of Philadelphia, Philadelphia
National Institutes of Health (NIH)
NIH
National Center for Complementary and Integrative Health (NCCIH)
NIH
Children's Hospital of Philadelphia
OTHER