328
Participants
Start Date
October 31, 2007
Primary Completion Date
October 31, 2010
Study Completion Date
December 31, 2013
Vitamin D
Taken orally every day for three months
Placebo
Placebo pill taken once daily for 3 month
Dana-Farber Cancer Institute, Boston
Harvard School of Public Health (HSPH)
OTHER
Dana-Farber Cancer Institute
OTHER