Vitamin D status and secondary hyperparathyroidism: The importance of 25-hydroxyvitamin D cut-off levels

1. Gómez-Alonso, C.
2. Naves-Díaz, M.L.
3. Fernández-Martín, J.L.
4. Díaz-López, J.B.
5. Fernández-Coto, M.T.
6. Cannata-Andía, J.B.