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AUTHORS' CONTRIBUTIONS SP and KP conceived and designed the research, performed statistical analysis, drafted the manuscript, and made critical revisions of the manuscript for key intellectual content

For Novotny and his colleagues "it seemed important to organise efforts to address this environmental blight while trying to reduce the health effects of smoking too"

Many years ago, while joining "The Late Show with David Letterman," Macdonald gave us a great glimpse into the hilarity of hanging with Bob: 14

As a result, neither the retailer nor the customer realises the cause of problems after moderate regular consumption

The composition of sidestream smoke differs from mainstream smoke, with higher concentrations of certain chemicals due to the incomplete burning of tobacco

When a fixed local significance mask is applied ( p 1000-km for at least half the objects lifetime