Al-Mukhaini, N.M., Ba-Omar, T.A., Eltayeb, E.A. and Al-Shehi, A.H. 2015. Characterisation of Nicotine and Cancer-Enhancing Anions in the Common Smokeless Tobacco Afzal in Oman. Sultan Qaboos University Medical Journal. 15, 4 (Nov. 2015), 469–476.