Al-Mukhaini, Nawal, Taher Ba-Omar, Elsadig A. Eltayeb, and Aisha A. Al-Shehi. 2020. “Analysis of Tobacco-Specific Nitrosamines in the Common Smokeless Tobacco Afzal in Oman”. Sultan Qaboos University Medical Journal 16 (1):20-26. https://doi.org/10.18295/squmj.2016.16.01.005.