666
Participants
Start Date
January 11, 2017
Primary Completion Date
November 30, 2021
Study Completion Date
March 4, 2022
Vitamin D3
cholecalciferol (vitamin D3) 2000 IU capsules daily
Placebo
University of California, Los Angeles, Los Angeles
Northwestern University, Evanston
John Hopkins University, Baltimore
Columbia Univeristy, New York
Wake Forest University, Winston-Salem
National Heart, Lung, and Blood Institute (NHLBI)
NIH
University of Washington
OTHER