Three new tools to diagnose B12 deficiency: eGFR-adjusted methylmalonic acid (MMA100), a bivariate reference area for MMA100 and cobalamin, and a cobalamin deficiency indexArne Åsberg Gustav Mikkelsen Ingrid Alsos Lian a Department of Clinical Chemistry, St. Olav Hospital, Trondheim University Hospital, Trondheim, Norwayb Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norwayon March 1, 2025 at 7:30 am
