An isotope dilution-liquid chromatography-tandem mass spectrometry-based candidate reference measurement procedure for the quantification of piperacillin in human serum and plasma - Sandra Fleischer; Judith Taibon; Neeraj Singh; Carina Schuster; Arber Rexhaj; Michael Vogeser; Friederike Bauland; Andrea Geistanger; Elie Fux (Clinical Chemistry and Laboratory Medicine (CCLM), 2026)