“…By 2030, MDD will be the leading cause of the burden of disease worldwide ( Collins et al, 2011 ). Plenty of studies have shown that patients with MDD have aberrant brain imaging ( Zhang et al, 2018 ; Liang et al, 2020 ; Yang et al, 2021 ), clinical ( Caldwell and Steffen, 2018 ; Kircanski et al, 2019 ), event-related potentials (ERPs; Landes et al, 2018 ; Kim et al, 2020 ; Fan et al, 2021 ; Xin et al, 2021 ), and cognitive indicators ( Pan et al, 2019 ). MDD is a heterogeneous disease ( Harald and Gordon, 2012 ), and its etiology remains vague.…”