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High blood calcium and 1,25-(OH)2D levels at presentation decreased during follow-up [11.1 ± 1 vs. 9.9 ± 0.5 mg/dl (p = 0.012), and 307 ± 130 vs. 209 ± 65 pmol/l (p = 0.03), respectively]; this paralleled an increase in suppressed PTH levels (5.8 ± 0.9 vs. 11.8 ± 7.3 pg/ml, p = 0.2). Substantial improvements in hypercalciuria and renal sonography findings were not observed. Two patients had impaired renal function (eGFR 84-88 ml/min/1/73 m2) at the last follow up. Interventions included appropriate diet, citrate supplement