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, Reference Bonilla, Lopez-Gonzales, Ramirez-Saens, Rodriguez-Reinoso and Valenzuela-Calahorro1981), surface area (Jimenez-Lopez et al

After statistical consultation, the sample size was increased to n = 320 and the study population was divided into three groups: Group 1 (non-smoking patients), Group 2 (smokers with or without additional e-cigarette and/or hookah consumption) and Group 3 (exclusive e-cigarette and/or hookah consumption)

MoMA PS1, New York

The study population was quite heterogeneous, meaning that often studies looked at dual users, meaning those who used e-cigarettes and combustible cigarettes, Bjurlin said