laboratory diagnostic - vitamins - Vitamin D - 1,25-dihidroxyvitamina D, Calcitriol - second intention test for assessment of Vitamin D deficiences, serum 3ml (1 specific aliquot for this analysi), The serum must be frozen within 4 hour after collection and must be sent in the frozen samples container, CLIA, todylaboratories®, code L76LD1331