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.
Bim Júnior O, Cebim MA, Atta MT, Machado CM, Francisconi-Dos-Rios LF, Wang L.Bim Júnior O, et al.Microsc Microanal. 2017 Feb;23(1):122-130. doi: 10.1017/S143192761601271X.Microsc Microanal. 2017.PMID: 28228165