Classification of rickets (ADHR: autosomal dominant hypophosphatemic rickets, ARHR: autosomal recessive hypophosphatemic rickets, ENS: epidermal nevus syndrome, FGF23: fibroblast growth factor 23, FS: Fanconi syndrome, HHRH: hypophosphatemic rickets with hypercalciuria, NPT2a: sodium phosphate cotransporter 2a, NHERF1: sodium hydrogen exchange regulator factor 1, OGD: osteoglophonic dysplasia, PTH: parathyroid hormone, TIO: tumor-induced osteomalacia, Vit D: vitamin D, XLH: X-linked hypophosphatemic rickets)