From the University of Pittsburgh Medical Center, Pittsburgh, PA.

The manuscript submitted does not contain information about medical device(s)/drug(s).

No funds were received in support of this work. No benefits in any form have been or will be received from a commercial party related directly or indirectly to the subject of this manuscript.

Address correspondence and reprint requests to James D. Kang, MD, University of Pittsburgh Medical Center, 200 Lothrop Street, PUH C-313, Pittsburgh, PA 15213; E-mail: kangjd@msx.upmc.edu