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.
Prevalence of vitamin D deficiency (< 15 ng/ml), insufficiency (15 – 30 ng/ml), and sufficiency (> 30 ng/ml) in Whites, Blacks, and Mexican-Americans with chronic kidney disease. Data taken from the Third National Health and Nutrition Examination Survey.
