From the Mayo Clinic, Jacksonville, FL.
Received for publication September 21, 2006; revision received December 29, 2006; accepted January 7, 2007.
Reprints: S. Akbar Hasan, 4500 San Pablo Road, Mayo Clinic, Davis 2W, Jacksonville, FL 32224 (e-mail: [email protected]).
doi: 10.1097/ICO.0b013e318053387f