Evaluating agreement between separate capillary sampling sites and venous concentrations of β-hydroxybutyrate measured by a point-of-care device and liquid chromatography tandem mass spectrometry​Lise Nørkjær Bjerg Henrik Holm Thomsen Birgitte Sandfeld-Paulsen a Department of Clinical Biochemistry, Regional Hospital Viborg, Viborg, Denmarkb Medical Diagnostic Center, University Clinic for Innovative Patient Pathways, Regional Hospital Central Jutland, Viborg, Denmarkc Department of Clinical Medicine, Aarhus University, Aarhus, Denmarkd Department of Clinical Biochemistry, Aalborg University Hospital, Aalborg, Denmarkon February 3, 2025 at 11:34 am