APA

Lankes U., Elder P. A., Lewis J. G. & George P. (20150810). Differential extraction of endogenous and exogenous 25-OH-vitamin D from serum makes the accurate quantification in liquid chromatography-tandem mass spectrometry assays challenging. : Annals of clinical biochemistry.

Chicago

Lankes Ulrich, Elder Peter A, Lewis John G and George Peter. 20150810. Differential extraction of endogenous and exogenous 25-OH-vitamin D from serum makes the accurate quantification in liquid chromatography-tandem mass spectrometry assays challenging. : Annals of clinical biochemistry.

Harvard

Lankes U., Elder P. A., Lewis J. G. and George P. (20150810). Differential extraction of endogenous and exogenous 25-OH-vitamin D from serum makes the accurate quantification in liquid chromatography-tandem mass spectrometry assays challenging. : Annals of clinical biochemistry.

MLA

Lankes Ulrich, Elder Peter A, Lewis John G and George Peter. Differential extraction of endogenous and exogenous 25-OH-vitamin D from serum makes the accurate quantification in liquid chromatography-tandem mass spectrometry assays challenging. : Annals of clinical biochemistry. 20150810.