AbstractPrevious studies have shown that the measurement of vitamin D and its derivatives, especially its active metabolite 1α, 25-dihydroxy-vitamin D [1,25(OH)Performance data of this assay were determined including intra- and inter-assay precision, recovery, linearity, and limit of detection of the DiaSorin 1,25(OH)The performance evaluation of 1,25(OH)The DiaSorin LIAISON XL 1,25(OH)