An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Zhang HL, Yang YS, Duan JN, Shang QX, He SL, Gu YM, Hu WP, Wang WP, Hu Y, Wang Y, Yuan Y, Chen LQ.Zhang HL, et al. Among authors: gu ym.World J Gastroenterol. 2020 Feb 28;26(8):839-849. doi: 10.3748/wjg.v26.i8.839.World J Gastroenterol. 2020.PMID: 32148381Free PMC article.
Zhang XY, Yang YS, Shang QX, Gu YM, Shi GD, Zhang HL, Li XY, Chen LQ.Zhang XY, et al. Among authors: gu ym.Zhonghua Wai Ke Za Zhi. 2021 Aug 1;59(8):660-666. doi: 10.3760/cma.j.cn112139-20210201-00060. Online ahead of print.Zhonghua Wai Ke Za Zhi. 2021.PMID: 34192858Chinese.