TY - RPRT TI - Decrease in serum levels of 1,25-dihydroxycholecalciferol in rats and chickens fed a vitamin D-deficient diet. AU - J P Mallon AU - A Boris AU - G F Bryce PY - 1981 DO - 10.1093/jn/111.4.665 UR - https://pubmed.ncbi.nlm.nih.gov/6894309/ ID - 6894309 ER -