PPBP and autoimmune disease: Higher plasma levels of CXCL7 have also been found in other autoimmune diseases, such as Sjogren syndrome, Vogt-Koyanagi-Harada syndrome (VKH), and vitiligo (Egerer et al., 2006; Liang et al., 2019; Egbeto et al., 2020), further indicating that CXCL7 could play an important role in the pathogenesis of autoimmune diseases that should be further studied in more detail.