Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Results of combination of RCTs and observational studies in Bayesian. aRR < 1 means that results favor Vitamin D supplementation. bTau-square means between study variance. RCT, randomized controlled trial; RR, risk ratio; MD, mammography density.
