Kareem, Haifa H, Batool H Al-Ghurabi, and Cinaria Albadri. “Molecular Detection of Porphyromonas Gingivalis in COVID-19 Patients”. Journal of Baghdad College of Dentistry 34, no. 2 (June 15, 2022): 52–61. Accessed August 19, 2022. https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/3145.