Analysis of HLA-DQB1 Alleles Frequency in Patients with Chronic Periodontitis Journal title: International Journal of Medical Research & Health Sciences (IJMRHS) Authors: Al-Ghurabi Batool H| Department of Basic Science, College of Dentistry, University of Baghdad, Iraq... Subject(s): Medicine, Biomedicine, Dentistry and Oral Surgery, Oncology, Public Health and Community Medicine