Buyukberber, S., Buyukberber, N., Turgay, M., & Tokgoz, G. (2021). Serum immunoglobulin levels in systemic lupus erythematosus: is IgA level an activity criterion . Annals of Medical Research, 2(4), 0336-0342. http://www.annalsmedres.org/index.php/aomr/article/view/2466