Smoking prevalence and patterns among resident doctors at Aleppo University Hospital, Syria: a cross-sectional study av Mohamad moafak Hariri, Mohammed Moutaz Alshaghel, Mohamad Aref Dabbas, Muawia Alhasan, Mohamad Yazan Hamwi, Asaad Nazmi Alrefai, Alaa Kourdy, Mohamed Naji Sajee, Ahmad Kadan, Abdullah Khoury

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