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These comorbidities are closely linked to tobacco use. A harmful combination In conducting this study, the researchers were able to tap into an existing data source: the COVID-19 Citizen Science Study a mobile app developed by UCSF researchers that contained a wealth of data, including mental health status and substance use, collected from participants around the country through online surveys

The researchers used data from regularly scheduled phone surveys that the federal Centers for Disease Control and Prevention take of health behaviors

Xylitol, for example, is a popular sugar substitute commonly recommended by dentists and other oral health professionals

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