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Experiences and challenges for EQA providers in assessing the commutability of control materials in accuracy-based EQA programs (2024)

Vierbaum, Laura ; Kaiser, Patricia ; Spannagl, Michael ; Wenzel, Folker ; Thevis, Mario ; Schellenberg, Ingo

Longitudinal analysis of external quality assessment of immunoassay-based steroid hormone measurement indicates potential for improvement in standardization (2024)

Vierbaum, Laura ; Weiss, Nathalie ; Kaiser, Patricia ; Kremser, Marcel ; Wenzel, Folker ; Thevis, Mario ; Schellenberg, Ingo ; Luppa, Peter B.

Investigations into the concentrations and metabolite profiles of doping agents and antidepressants in human seminal fluid using liquid chromatography-mass spectrometry (2024)

Breuer, Johanna ; Garzinsky, Ann-Marie ; Thomas, Andreas ; Kliesch, Sabine ; Nieschlag, Eberhard ; Wenzel, Folker ; Georgas, Evangelos ; Geyer, Hans ; Thevis, Mario

Longitudinal evaluation of laboratory results and method precision in worldwide erythropoietin external quality assessments (2024)

Toll, Luisa J. ; Weiss, Nathalie ; Vierbaum, Laura ; Schellenberg, Ingo ; Thevis, Mario ; Wenzel, Folker

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