In Argentina, Bolivia, Colombia, Costa Rica, Guatemala and Mxico, more than one in five cigarettes sold contain flavor capsules
many of these substances are known irritants or can increase susceptibility to viral infections.2224 As a consequence of the structure of the device itself, many different heavy metals, such as chromium, manganese and even arsenic, have been reported to be detected in electronic cigarette liquids and aerosols
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These challenges can lead to higher relapse rates, as individuals may turn to substances as coping mechanisms for managing their discomfort
(iii) Coughing : Successive, forced coughing for 30 s at a comfortable rate and intensity for the participant