“…Recent ECT studies consistently showed significant clinical effects of ECT on suicidality (Kellner et al, 2005;Bradvik and Berglund, 2006;Patel et al, 2006;Ambade et al, 2009;Keshtkar et al, 2011;Ahmadi et al, 2016;Kawoos et al, 2018;Liang et al, 2018), whereas earlier studies did not show any difference between ECT-treated groups and control patients Winokur, 1976, 1978;Tsuang et al, 1979;Black et al, 1989;Sharma, 1999). This difference may be the result of standardization of ECT techniques, which allowed for retained clinical efficacy and fewer adverse effects (Tirmizi et al, 2012).…”