Stotts and his staff are recruiting 300 teenagers for this initial study. They think they can quit when the first bad symptoms appear. People who use smokeless tobacco three times a day are addicted, researchers say. But smokeless tobacco carries serious health risks, too, he said, including oral cancer. Researchers will test the samples to determine whether the participants stayed off tobacco for a year.
Psychological addiction is the user's dependence on the smell, taste and feel of tobacco.
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