Efficacy of Usual Vitamin D Supplementation and Its Impact on Children and Adolescents Calciuria.

"VISIT 1:~Patient \> 60 kg and initial 25OHD serum concentration \< 25nmol/L : prescription of 4 vials to be taken every 2 weeks between 25 and 50 nmol/L: prescription of 3 vials to be taken every 2 weeks between 50 and 75 nmol/L: prescription of 2 vials to be taken every 2 weeks Patient between 20 and 60 kg and initial 25OHD serum concentration \< 25nmol/L: prescription of 2 vials to be taken every month between 25 and 50 nmol/L: prescription of 2 vials to be taken every 6 weeks between 50 and 75 nmol/L: prescription of 1 single vial Patient \< 20 kg and initial 25OHD serum concentration \< 75 nmol/L: prescription of 1 single vial~A local lab will performed urinary dosage of calciuria and creatininuria:~* at days 0, 1, 2, 3, 4 and 7 after the first intake of a 25OHD vial~* at days 0, 2 and 4 after other intakes (when applicable)~VISIT 2:~25OHD serum concentration will then be dosed at month 2 after visit 1"