Tobacco firms deny advertising on YouTube

Researchers have accused tobacco companies of using YouTube to advertise their products, getting around a voluntary ban on cigarette advertising. A new study published in the online journal Tobacco Control has called into question a number of  "very professionally made" clips posted on the video sharing website. Researchers from the University of Otago in New Zealand searched the site for references to the tobacco brands Marlboro, L&M, Benson and Hedges,...