A pragmatic bottom-up approach to harmonize the units of clinical chemistry tests among Belgian clinical laboratories, focusing on immunoassays., Demarteau, Marianne, Cammaert Piet, Vandevelde N.M., Callewaert Nico, Coucke Wim, China Bernard, and Verstraete Alain G. , Clin Chem Lab Med, 2018 Dec 19, Volume 57, Issue 1, (2018)