MBP and schizophrenia: The reproducibility of this approach has been shown in studies by various groups of authors over the past 30 years, including MBP-hydrolyzing IgGs in schizophrenia (Polosukhina et al., 2005; Polosukhina et al., 2004; Parshukova et al., 2020b; Parshukova et al., 2019; Timofeeva, Buneva & Nevinsky, 2015).