title: The impact of smoking on perianal disease.
authors.forename: David D E
authors.initials: DD
authors.lastname: Zimmerman
mesh_terms: D000038:Abscess / Q000453:epidemiology / Q000209:etiology*; D001004:Anus Diseases / Q000453:epidemiology / Q000209:etiology*; D015984:Causality; D006801:Humans; D015994:Incidence; D012003:Rectal Fistula / Q000453:epidemiology / Q000209:etiology*; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects* / Q000453:epidemiology; D014481:United States / Q000453:epidemiology; D014728:Veterans