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Based on a power calculation using the Clincalc.com (ClinCalc LLC, Arlington Heights, IL, USA) sample size calculator with an assumed average BP of 120 mmHg, a BP variability of 5 mmHg, a clinically relevant difference of 6 mmHg, an enrollment ratio of 3, an alpha of 0.05, and a power of 80%, at least 28 participants, of which at least 7 in each of the cessation and relapse groups, were to be included

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A call for the development of a clinical tool to quantify lifetime betel quid exposure, inspired by the pack-years concept in smokingBetelyears

1 2 "Reasons for Electronic Cigarette Experimentation and Discontinuation Among Adolescents and Young Adults"

A recent study indicates that the concentration of arsenic was significantly higher in scalp hair and blood samples of tobacco chewing patients than those of controls4