March 31, 2016 – The U.S. Preventive Services Task Force posted today a draft research plan on vitamin D, calcium, or combined supplementation for the primary prevention of fractures in adults. The draft research plan is available for review and public comment from March 31, 2016 through April 27, 2016. To review the draft research plan and submit comments, go to /uspstf/public-comments-and-nominations/opportunity-for-public-comment.