Testing MMA100 – the eGFR-adjusted concentration of methylmalonic acid in plasma​Arne Åsberg Ingrid Alsos Lian Gustav Mikkelsen Øyvind Skadberg a Department of Medical Biochemistry, Stavanger University Hospital, Stavanger, Norwayb Department of Clinical Chemistry, St. Olav hospital, Trondheim University Hospital, Trondheim, Norwayc Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norwayon November 12, 2025 at 8:55 am