S100B and major depressive disorder: HSP60 levels were detected in only 32 participants (control, n = 8; MDD, n = 5; BD, n = 12; SCZ, n = 3; GAD, n = 4), and S100B was detected in 34 participants (control, n = 6; MDD, n = 7; BD, n = 10; SCZ, n = 6; GAD, n = 5).