...
机译:The vitamin D status of the US population from 1988 to 2010 using standardized serum concentrations of 25-hydroxyvitamin D shows recent modest increases
CDC, Natl Ctr Environm Hlth, Atlanta, GA 30333 USA;
CDC, Natl Ctr Hlth Stat, Atlanta, GA 30333 USA;
NIH, Off Dietary Supplements, Bldg 10, Bethesda, MD 20892 USA;
standardization; survey; vitamin D; trend; NHANES; supplements;