TNFSF18 and Decreased total leukocyte count: In addition, patients with leukopenia were observed having markedly increased serum GITRL and sGITR levels (GITRL: 9.18 ± 8.91 versus 3.29 ± 2.96, P = 0.0158; sGITR: 7.28 ± 4.03 versus 4.10 ± 2.18, P = 0.0110), as shown in Table 2.