| 25 D3 | 25-hydroxy-vitamin D3 |
| 1,25 D3 | 1,25-dihydroxy-vitamin D3 |
| CKD | chronic kidney disease |
| CMIA | chemoluminescent microparticle immunoassay |
| CV | variation coefficient |
| conc. | concentration |
| CRP | C-reactive protein |
| ECLIA | electrochemiluminescence immunoassay |
| ELISA | enzyme linked immunosorbant assay |
| FGF23 | fibroblast growth factor 23 |
| LC-MS | liquid chromatography-mass spectrometry |
| noxPTH | non-oxidised parathyroid hormone |
| noxPTH/PTHi Ratio | non-oxidised parathyroid hormone/intact parathyroid hormone ratio |
| oxPTH | oxidised parathyroid hormone |
| PTH R1 | parathyroid hormone receptor 1 |
| VDBP | vitamin D binding protein |
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