Prev Index Next. The prevalence of those who tried smoking was Regarding a study conducted in Riyadh, there was no relationship between smoking and GPA. Pattern and prevalence of smoking among students at king faisal university, Al Hassa, Saudi Arabia.
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This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3. The consent was obtained from study participants before questionnaire filling.