ENO2 and Behcet disease: Previous studies with small sample sizes have shown unaltered circulating NSE levels in SZ (Egan et al., 1992; Schroeter, Abdul-Khaliq, Krebs, Diefenbacher, & Blasig, 2009; Steiner, Bielau, Bernstein, Bogerts, & Wunderlich, 2006), while studies of circulating NSE in BD have shown conflicting results (Akcan, Karabulut, Ismail Kucukali, Cakir, & Tuzun, 2018; Karabulut et al., 2019; Machado-Vieira et al., 2007; Tsai & Huang, 2017; Wiener et al., 2013).