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Researchers at University College London (UCL) found that, on average, a cigarette takes about 20 minutes off a person's life

An opportunity to change course would come through a transition in Chinas political leadership in 2013, when Xi Jinping became president

Rachel Boykan told NBC News

Cigarette vending machines are typically situated in restaurants, stores, club/casino bars, or locations with gaming machines that are solely accessible to people over the age of 18

Each week its Web site, www.smokefreemovies.ucsf.edu, lists the top movies at the box office and on DVD, and notes whether they promote smoking

The company had no comment about the research, a spokesman said all the research happened too long ago