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.
Chen HJ, Chen JL, Chen CY, Lee M, Chang WH, Huang TT.Chen HJ, et al. Among authors: chang wh.Int J Environ Res Public Health. 2019 Jun 24;16(12):2228. doi: 10.3390/ijerph16122228.Int J Environ Res Public Health. 2019.PMID: 31238591Free PMC article.Clinical Trial.
Chen YM, Lai SS, Pei YC, Hsieh CJ, Chang WH.Chen YM, et al. Among authors: chang wh.J Vis Exp. 2020 May 20;(159). doi: 10.3791/61057.J Vis Exp. 2020.PMID: 32510515
Chang WH, Tu LW, Pei YC, Chen CK, Wang SH, Wong AM.Chang WH, et al.Biomed J. 2021 Dec;44(6):739-747. doi: 10.1016/j.bj.2020.05.020. Epub 2020 Jun 13.Biomed J. 2021.PMID: 35166212Free PMC article.Clinical Trial.