High Rates of Smoking Especially in Female Crohn's Disease Patients and Low Use of Supportive Measures to Achieve Smoking Cessation--Data from the Swiss IBD Cohort Study. - Biedermann, Luc; Fournier, Nicolas; Misselwitz, Benjamin; Frei, Pascal; Zeitz, Jonas; Manser, Christine N.; Pittet, Valerie; Juillerat, Pascal; von Känel, Roland; Fried, Michael; Vavricka, Stephan R.; Rogler, Gerhard (Journal of Crohn's & Colitis, 2015)