Failure to heal D-deficiency rickets and suppress secondary hyperparathyroidism with conventional doses of 1, 25-dihydroxy vitamin D3. Issue 6319 (20th March 1982) - Cundy, T; Kanis, J A; Heynen, G; Earnshaw, M; Clemens, T L; O'Riordan, J L; Merrett, A L; Compston, J E