Kütükçüler N, Tütüncüoğlu S, Yilmaz D, Akalin T, Kandiloğlu G. Subcutaneous granuloma annulare and IgA-IgG2 deficiency. Turk J Pediatr. 1998;40(2):279-281. Accessed May 25, 2026. https://turkjpediatr.org/article/view/3312