In addition, individuals who smoke conventional cigarettes and use e-cigarettes (dual use) showed the highest likelihood of developing COPD compared with those who have never smoked conventional cigarettes or used e-cigarettes [108, 110,111,112]
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(RAR) Acknowledgments We would like to express our sincere appreciation to Hana Ross, Emmanuel Guindon, Nicole Vellios, Hoang The Ky, Nguyen Thi Trang Nhung, and participants in a workshop in HealthBridges Vietnam office (in June 2019) and the GACD Annual Scientific Meeting (in November 2019) for very helpful comments on this study