Improved method for the determination of serum 25-hydroxyvitamin D2 and 25-hydroxyvitamin D3 by ultra-performance liquid chromatography tandem mass spectrometry
YU Songlin, FANG Huiling, ZHANG Ruiping, CHENG Xinqi, HAN Jianhua, SU Wei, CHENG Qian, HOU Li'an, JIANG Xiaomei, QIU Ling
Laboratory Medicine . 2015, (10): 1021 -1026 .  DOI: 10.3969/j.issn.1673-8640.2015.10.014