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Di Caro S, May A, Heine DG, Fini L, Landi B, Petruzziello L, Cellier C, Mulder CJ, Costamagna G, Ell C, Gasbarrini A; DBE-European Study Group.Di Caro S, et al. Among authors: ell c.Gastrointest Endosc. 2005 Oct;62(4):545-50. doi: 10.1016/j.gie.2005.04.029.Gastrointest Endosc. 2005.PMID: 16185969
May A, Nachbar L, Ell C.May A, et al. Among authors: ell c.Gastrointest Endosc. 2005 Jul;62(1):62-70. doi: 10.1016/s0016-5107(05)01586-5.Gastrointest Endosc. 2005.PMID: 15990821
May A, Ell C.May A, et al. Among authors: ell c.Gastrointest Endosc Clin N Am. 2006 Apr;16(2):377-82. doi: 10.1016/j.giec.2006.01.016.Gastrointest Endosc Clin N Am. 2006.PMID: 16644465Review.
Messer I, May A, Manner H, Ell C.Messer I, et al. Among authors: ell c.Gastrointest Endosc. 2013 Feb;77(2):241-9. doi: 10.1016/j.gie.2012.08.020. Epub 2012 Oct 6.Gastrointest Endosc. 2013.PMID: 23043851Clinical Trial.
May A, Nachbar L, Schneider M, Ell C.May A, et al. Among authors: ell c.Am J Gastroenterol. 2006 Sep;101(9):2016-24. doi: 10.1111/j.1572-0241.2006.00745.x.Am J Gastroenterol. 2006.PMID: 16968508Clinical Trial.
May A, Nachbar L, Pohl J, Ell C.May A, et al. Among authors: ell c.Am J Gastroenterol. 2007 Mar;102(3):527-35. doi: 10.1111/j.1572-0241.2007.01063.x.Am J Gastroenterol. 2007.PMID: 17222315
Ell C, May A, Pech O, Gossner L, Guenter E, Behrens A, Nachbar L, Huijsmans J, Vieth M, Stolte M.Ell C, et al.Gastrointest Endosc. 2007 Jan;65(1):3-10. doi: 10.1016/j.gie.2006.04.033.Gastrointest Endosc. 2007.PMID: 17185072
May A, Färber M, Aschmoneit I, Pohl J, Manner H, Lotterer E, Möschler O, Kunz J, Gossner L, Mönkemüller K, Ell C.May A, et al. Among authors: ell c.Am J Gastroenterol. 2010 Mar;105(3):575-81. doi: 10.1038/ajg.2009.712. Epub 2010 Jan 5.Am J Gastroenterol. 2010.PMID: 20051942Clinical Trial.