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E-cigarette use is associated with an increase in asthma exacerbations

Researchers pooled data from 141 studies done in 21 countries and regions, together involving millions of people

Clinicians and public health practitioners should increase awareness that dual use of cigarettes and e-cigarettes is not safe and may present similar risks as continuing to smoke cigarettes, especially if one does not reduce the number of cigarettes smoked, Xue added

The rep told TMZ that the rumors are "absolutely not true," and Justin is starting to feel drained by the reports that he is struggling with his mental and physical health

Comparing illicit drug use in 19 European cities through sewage analysis