Rajeev Kishore Saxena et al. 2023. Qualitative Assessment of Helicobacter pylori by PCR in the Saliva of Male Smokers and Non-Smokers with Chronic Periodontitis. Novel Research Aspects in Medicine and Medical Science Vol. 5. (Oct. 2023), 173–187. DOI:https://doi.org/10.9734/bpi/nramms/v5/6087C.