Determinations of serum 25-hydroxyvitamin D2 and 25-hydroxyvitamin D3 concentrations in cord blood by liquid chromatography tandem-mass spectrometry
ZHAO Li, WANG Weiye.
Laboratory Medicine . 2015, (8): 825 -829 .  DOI: 10.3969/j.issn.1673-8640.2015.08.013