Large method differences for free thyroid hormone assays in the hyperthyroid range can affect assessment of hyperthyroid status: Comparison of Abbott Alinity to Roche Cobas, Siemens Centaur and equilibrium dialysis LC-MS/MS

Alexander B. Westbye, Finn Erik, Sandra Rinne Dahl, Svetlana N. Zykova, Oskar Kelp, Louise K. Dahll, Per Medbøe Thorsby