| PRAL | Potential Renal Acid Load |
| NEAP | Net Endogenous Acid Production |
| NAE | Net Acid Excretion |
| OA | Organic acids |
| TA | Titrable acids |
| NH4+ | Ammonium |
| HCO3- | Bicarbonate |
| Ca | Calcium |
| Mg | Magnesium |
| Na | Sodium |
| K | Potassium |
| Cl | Chloride |
| SO4 | Sulfate |
| P | Phosphorus |
| BE | Base Excess |
| CaOx | Calcium oxalate |
| CaP | Calcium phosphate |
| RS | Relative supersaturation |
| UA | Uric acid |
| Cr | Creatinine |
| CTX | C-terminal fragment of the type I collagen (CTX) |
| iCa | Ionized calcium |
| P1NP | Procollagen type 1 N-terminal propeptide |
| PTH | Parathyroid hormone |
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