Ca. P Serum D(+), PTH(+) I Gut Ca, P Bone D(+),PTH(+) CT( Ca P Kidney D(-) DO PTHO PTH(+) CT(+) CT(+) FGF23(+ Ca Calcium and phosphate metabolism in the body and the regulation parathyroid hormone(PTH), Calcitonin (CT), 1, 25(OH)2 D3( D), fibroblast growth factor 23(FGF23)Calcium and phosphate metabolism in the body and the regulation parathyroid hormone (PTH), Calcitonin (CT),1,25(OH)2 D3 (D), fibroblast growth factor 23 (FGF23)