Ahmad Iqbal, M. M., Ahsan Iqbal, M. M., Ashraf, M. F., Mehmood, Z., & Ali, U. (2015). Transition from Smoking Drugs to Injectable Drugs: Causes and Consequences. Pakistan Journal of Nutrition, 14(8), 535–539. https://doi.org/10.3923/pjn.2015.535.539