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.
Volcheck GW, Li JT.Volcheck GW, et al. Among authors: li jt.Mayo Clin Proc. 1997 Feb;72(2):140-7. doi: 10.4065/72.2.140.Mayo Clin Proc. 1997.PMID: 9033547Review.
Valyasevi MA, Maddox DE, Li JT.Valyasevi MA, et al. Among authors: li jt.Ann Allergy Asthma Immunol. 1999 Aug;83(2):132-6. doi: 10.1016/S1081-1206(10)62624-5.Ann Allergy Asthma Immunol. 1999.PMID: 10480586