Vitamin D "resistance" and the bioavailability of calciferol tablets.
D004351:Drug Resistance; D004872:Ergocalciferols / Q000008:administration & dosage*; D006801:Humans; D013607:Tablets; D014807:Vitamin D / Q000008:administration & dosage*
D004872:Ergocalciferols; D013607:Tablets; D014807:Vitamin D