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.
Davis AM, Wilkinson JL, Karl TR, Mee RB.Davis AM, et al. Among authors: karl tr.J Thorac Cardiovasc Surg. 1993 Jul;106(1):111-5.J Thorac Cardiovasc Surg. 1993.PMID: 8320989
Brizard CP, Mas C, Sohn YS, Cochrane AD, Karl TR.Brizard CP, et al. Among authors: karl tr.J Thorac Cardiovasc Surg. 1998 Nov;116(5):770-9. doi: 10.1016/s0022-5223(98)00454-1.J Thorac Cardiovasc Surg. 1998.PMID: 9806384Free article.
Fulton JO, Mas C, Brizard CP, Cochrane AD, Karl TR.Fulton JO, et al. Among authors: karl tr.Ann Thorac Surg. 1999 Jan;67(1):177-81. doi: 10.1016/s0003-4975(98)01193-x.Ann Thorac Surg. 1999.PMID: 10086545