Smokers with active Crohn's disease have a clinically relevant dysbiosis of the gastrointestinal microbiota

Jane L Benjamin, Charlotte RH Hedin, Andreas Koutsoumpas, Siew C Ng, Neil E McCarthy, Natalie J Prescott, Pedro Pessoa-Lopes, Christopher G Mathew, Jeremy Sanderson, Ailsa L Hart, Michael A Kamm, Stella C Knight, Alastair Forbes, Andrew J Stagg, James O Lindsay, Kevin Whelan