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In middle adolescents (high school age), the perceived positive qualities of smoking are a powerful motivator for smoking, and these qualities include attractiveness and interest from the opposite sex (3)

Effect of tobacco and nicotine in causing staining of dental hard tissues and dental materials: A systematic review and meta-analysis

A world of endorsements In these early colorful ads, almost always made with illustrations rather than photographs, cigarettes are presented with words like fresh or mild and endorsed by well-known public figures like Marlene Dietrich, Bing Crosby, Ronald Reagan, Barbara Stanwyck, Spencer Tracy, Frank Sinatra and John Wayne, who subsequently blamed his habit for the cancer that took one of his lungs in 1964

doi:10.1016/S0140-6736(14)61682-2