ERVW-1 and schizophrenia: Consistent with the correlation analysis in mRNA levels, we found ERVWE1 had a positive correlation with HTR1B (p < 0.001, r = 0.81, Fig. 2I), Arc (p < 0.001, r = 0.77, Fig. 2J), and ALKBH5 (p < 0.001, r = 0.78, Fig. 2K) in the protein levels of schizophrenia patients, in which correlation coefficient all reached 0.7 or above, implying that there was a very robust correlation among them.