An international multi-center serum protein electrophoresis accuracy and M-protein isotyping study. Part II: limit of detection and follow-up of patients with small M-proteinsJacobs, Joannes; Turner, Katherine; Graziani, Maria Stella; Zemtsovskaja, GalinaClinical chemistry and laboratory medicine (CCLM)2020 / p. 547-559 : ill https://doi.org/10.1515/cclm-2019-1105