| REAGENT or RESOURCE | SOURCE | IDENTIFIER |
|---|---|---|
| Biological samples | ||
| Serum samples of the MARK-AGE study cohort | MARK-AGE Biobank at University of Hohenheim50,51 | N/A |
| Chemicals, peptides, and recombinant proteins | ||
| Glacial acetic acid | Sigma-Aldrich | Cat#PHR1748 |
| Dimethyl sulfoxide | Sigma-Aldrich | Cat#34869 |
| Dioctylamine | Sigma-Aldrich | Cat#D201146 |
| HPLC grade methanol | Sigma-Aldrich | Cat#34860 |
| ROTISOLV HPLC Gradient Grade | Carl Roth | Cat#A511.2 |
| Bilirubin | Sigma-Aldrich | Cat#B4126 |
| Software and algorithms | ||
| IBM SPSS Statistics, Version 28.0 | IBM Statistics | N/A |
| Other | ||
| Nexera HPLC/UHPLC Setup | Shimadzu | N/A |
| C18 HPLC-column | Fortis | N/A |
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