| Jan Hamling Systematic review of the relation between smokeless tobacco and cancer in Europe and North AmericaPeter N Lee PN Lee Statistics and Computing Ltd, Surrey, UK BMC Med 7:36. 2009 The relation between smokeless tobacco and cancer in Northern Europe and North America. A commentary on differences between the conclusions reached by two recent reviewsPeter N Lee PN Lee Statistics and Computing Ltd, Surrey, UK BMC Cancer 9:256. 2009 Facilitating meta-analyses by deriving relative effect and precision estimates for alternative comparisons from a set of estimates presented by exposure level or disease categoryJan Hamling P N Lee Statistics and Computing Ltd, 17 Cedar Road, Sutton, Surrey, U K Stat Med 27:954-70. 2008 Environmental tobacco smoke exposure and risk of breast cancer in nonsmoking women: a review with meta-analysesPeter N Lee P N Lee Statistics and Computing Ltd, Sutton, Surrey, United Kingdom Inhal Toxicol 18:1053-70. 2006
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