1. Cigarette Smoking and Adenomatous Polyps: A Meta-analysis
Edoardo Botteri, Simona Iodice, Sara Raimondi, Patrick Maisonneuve, Albert B. Lowenfels 
Gastroenterology 
Volume 134, Issue 2, Pages e3 (February 2008)
DOI: /j.gastro
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2. Figure 1
Forest plot for ever smokers vs never smokers. The partial endoscopy group is composed of studies in which some or all controls underwent partial colon examination. The full colonoscopy group is composed of studies in which all controls underwent complete colon examination. *Estimates for men; **estimates for women.
Gastroenterology  , e3DOI: ( /j.gastro )
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3. Figure 2
Funnel plot for ever vs never smokers. Weight is given by the inverse of standard error.
Gastroenterology  , e3DOI: ( /j.gastro )
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4. Supplementary Figure 1
Forest plot for current smokers versus never smokers.
Gastroenterology  , e3DOI: ( /j.gastro )
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5. Supplementary Figure 2
Forest plot for former smokers versus never smokers.
Gastroenterology  , e3DOI: ( /j.gastro )
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6. Supplementary Figure 3 Funnel plot for current versus never smokers.
Gastroenterology  , e3DOI: ( /j.gastro )
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7. Supplementary Figure 4 Funnel for former versus never smokers.
Gastroenterology  , e3DOI: ( /j.gastro )
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