to investigate whether hepatobiliary rickets is caused by defective intestinal absorption of vitamin d or by impaired hepatic hydroxylation of the vitamin , we studied three children who developed severe rickets , hypocalcemia , and hypophosphatemia , two despite having received 400 to 800 iu vitamin d per day by mouth , and one despite prolonged treatment with 10,000 iu daily .
C0035579
rickets
C0014695
vitamin d