Evaluation of Adherence to the Mediterranean Diet in Patients with Recurrent Renal Stones and Disease Osteometabolic

Inclusion Criteria: * Patients with idiopathic relapsing nephrolithiasis with evidence instrumental of bilateral renal stones or emission of more than one stone in the past 5 years Exclusion Criteria: * Patients who had albumin-corrected plasma calcium levels \> 11.0 mg/dl at the time of the first determination of serum levels of 25 OH vitamin D; * Patients who had glomerular filtration rate \< 60 mL/min/1.73 m2; * Patients who had positive personal history of chronic granulomatous disease; * pregnancy patients; * Positive personal history for morphological abnormalities of the excretory system; * incomplete data collection.