F. Demir Şahin, O. Kapçay, and M. Kılıç, “Clinical features and treatment outcomes in children with IgG subclass deficiency: A retrospective study”, Allergol Immunopathol, vol. 53, no. 6, pp. 55–60, Nov. 2025, doi: 10.15586/aei.v53i6.1401 .