Smokeless tobacco--a challenging smoke.
Bhatia
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D003430:Cross-Sectional Studies; D006801:Humans; D015994:Incidence; D007194:India / Q000453:epidemiology; D010947:Plants, Toxic; D014029:Tobacco Use Disorder / Q000453:epidemiology* / Q000517:prevention & control; D014030:Tobacco, Smokeless / Q000009:adverse effects*