1. The effect of CTLA-4 and CD28 gene variants and circulating protein levels in patients with gastric cancer
   Soykan Arikan et al, 2017, Turkish Journal of Biochemistry CrossRef
2. Association between CTLA-4 + 49A > G and – 318C > T single-nucleotide polymorphisms and susceptibility to thyroid neoplasm
   Shabnam Abtahi et al, 2018, Endocrine CrossRef