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Article Citation
Ott C, Takses A, Obermeier F, Schnoy E, Müller M. Smoking increases the risk of extraintestinal manifestations in Crohn's disease. World J Gastroenterol 2014; 20(34): 12269-12276 [PMID: 25232261 DOI: 10.3748/wjg.v20.i34.12269]
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