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Expect to see the images starting in September of 2012, a point in time during which certain ex-smokers will be sorely tempted to resume the habit.

The challenge for dental professionals is to identify users of these products as they may lack the typical signs of tobacco use, such as tobacco stains and odor, and the appearance of tissue changes in unusual areas, such as under the upper lip

Other images include a man with a tracheotomy smoking and a mother holding a baby with smoke swirling around them

The reliability and validity of the Alcohol Use Disorders Identification Test (AUDIT) in a German general practice population sample

Heroin can be snorted, smoked, or injected intravenously