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.
Rao H, Bai Y, Zhang F, Li Q, Zhuang B, Luo X, Qi H.Rao H, et al. Among authors: qi h.J Matern Fetal Neonatal Med. 2019 Jun;32(12):2069-2078. doi: 10.1080/14767058.2018.1425387. Epub 2018 Jan 16.J Matern Fetal Neonatal Med. 2019.PMID: 29307244
Chen GQ, Zhang H, Qi HB, Yao ZW, Gao L, Qiu CL.Chen GQ, et al. Among authors: qi hb.Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi. 2012 Mar;28(3):294-6.Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi. 2012.PMID: 22394641Chinese.