Study of the Relationship Between Blood Group and Group A Beta -Hemolytic Streptococci Isolated from Patients with Tonsillitis. Iraqi Journal of Science [Internet]. 2022 Jun. 24 [cited 2024 Nov. 22];57(2A):855-61. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/7448