1. Tangye SG, Al-Herz W, Bousfiha A, Chatila T, Cunningham-Rundles C, Etzioni A, et al. Human Inborn Errors of Immunity: 2019 Update on the Classification from the International Union of Immunological Societies Expert Committee. J Clin Immunol. 2020;40(1):24-64. 2. Boyarchuk O, Volyanska L, Kosovska T, Lewandowicz-Uszynska A, Kinash M. AWARENESS OF PRIMARY IMMUNODEFICIENCY DISEASES AMONG MEDICAL STUDENTS. Georgian Med News. 2018(285):124-30.3. Yüksek M, Ikincioğullari A, Doğu F, Elhan A, Yüksek N, Reisli I, et al. Primary immune deficiency disease awareness among a group of Turkish physicians. Turk J Pediatr. 2010;52(4):372-7. 4. Maródi L, Casanova JL. Primary immunodeficiency diseases: the J Project. Lancet. 2009;373(9682):2179-81. 5. Horváth Z, Rezaei N, Reisli I, Tuzankina I, Otarbayev N, Popandopulo P, et al. The spread of the J Project. J Clin Immunol. 2013;33(6):1037-42. 6. Yıldıran A, Çeliksoy MH, Borte S, Güner Ş N, Elli M, Fışgın T, et al. Hematopoietic Stem Cell Transplantation in Primary Immunodeficiency Patients in the Black Sea Region of Turkey. Turk J Haematol. 2017;34(4):345-9. 7. Kilic SS, Ozel M, Hafizoglu D, Karaca NE, Aksu G, Kutukculer N. The prevalences [correction] and patient characteristics of primary immunodeficiency diseases in Turkey--two centers study. J Clin Immunol. 2013;33(1):74-83. 8. Maródi L. The creation and progress of the J Project in Eastern and Central Europe. Ann N Y Acad Sci. 2011;1238:65-73. 9. Maródi L. Fifteen Years of the J Project. J Clin Immunol. 2019;39(4):363-9. 10. Azarsiz E, Gulez N, Edeer Karaca N, Aksu G, Kutukculer N. Consanguinity rate and delay in diagnosis in Turkish patients with combined immunodeficiencies: a single-center study. J Clin Immunol. 2011;31(1):106-11. 11. Celik G, Bakirtas A, Sackesen C, Reisli I, Tuncer A. Pediatric allergy and immunology in Turkey. Pediatr Allergy Immunol. 2011;22(4):440-8. 12. Argudo-Ramírez A, Martín-Nalda A, Marín-Soria JL, López-Galera RM, Pajares-García S, González de Aledo-Castillo JM, et al. First Universal Newborn Screening Program for Severe Combined Immunodeficiency in Europe. Two-Years’ Experience in Catalonia (Spain). Front Immunol. 2019;10:2406.