References
- Garcia-Pascual B., Peytremann A., Courvoisier B., Lawson D. E.M. A simplified competitive protein-binding assay for 25-hydroxycholecalciterol. Clinica chim. Acta 1976; 68: 99
- Haddad J. G., Chyu K. J. Competitive protein-binding radioassay for 25-hydroxycholecalciferol. J. clin. Endocr. Metab. 1971; 33: 992
- Lancet leader. The need for Vitamin D. supplements. Lancet 1973; i: 1097
- Lester E., Skinner R. K., Wills M. R. Seasonal variation in 25-hydroxycholecalciferol in healthy people. Lancet 1977; i: 979
- Lund B., Sørensen O. H. Measurement of 25-hydroxyvitamin D intake in serum and its relation to sunshire, age and vitamin D intake in the Danish population. Scand. J. clin. Lab. Invest. 1979; 39: 23
- Lund B., Sørensen O. H., Christensen A. B. 25-hydroxycholecalciferol and fractures of the proximal femur. Lancet 1975; ii: 300
- McLauchlin M., Raggatt P. R., Fairney A., Brown D. J., Lester E., Wills M. R. Seasonal variation in 25-hydroxycholecalciferol in healthy people. Lancet 1974; i: 536
- Offerman G., Von Herrath D., Schaefer K. Serum 25-hydroxycholecalciferol in uraemia. Nephron 1974; 13: 269
- Skinner R. K., Wills M. R. Serum 25-hydroxy-vitamin D assay. Evaluation of chromatographic and non-chromatographic procedures. Clinica chim. Acta 1977; 80: 543
- Snedecor G. W., Cochran W. G. Statistical Methods6th Edition. Iowa State University Press, Ames, Iowa 1967
- Stamp T. C.B., Round J. M. Seasonal changes in human plasma levels of 25-hydroxyvitamin D. Nature 1974; 247: 563