SOST and Marchiafava-Bignami disease: Biochemical markers of CKD‐MBD (calcium, phosphorus, 25(OH)D, PTH, and FGF‐23), bone formation (BSAP, OCN, P1NP) and resorption (C‐telopeptide, TRAP5B) markers, and SOST did not differ between low and non‐low turnover.