Comparison of six serum analyte workflows using routine liquid chromatography-tandem mass spectrometry methods at multiple laboratories with the Cobas i 601 analyzer, an automated mass spectrometry system. - Vermeersch P; de Jonge R; Miyazawa T; Nybo M; Fruekilde P; Toole BJ; Metz P; Albrecht E; Slusarczyk K; Vogeser M; Fitzgerald RL (Clinical chemistry and laboratory medicine, 2026)