Cut-off optimization for 13C-urea breath test in a community-based trial by mathematic, histology and serology approach by Zhe-Xuan Li, Lei-Lei Huang, Cong Liu, Luca Formichella, Yang Zhang, Yu-Mei Wang, Lian Zhang, Jun-Ling Ma, Wei-Dong Liu, Kurt Ulm, Jian-Xi Wang, Lei Zhang, Monther Bajbouj, Ming Li, Michael Vieth, Michael Quante, Tong Zhou, Le-Hua Wang, Stepan Suchanek, Erwin Soutschek, Roland Schmid, Meinhard Classen, Wei-Cheng You, Markus Gerhard, Kai-Feng Pan

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