Department of Pathology and Laboratory Medicine, Allegheny General Hospital, Allegheny Health Network, Pittsburgh, PA

The authors have no NIH funding or conflicts of interest to disclose.

Reprints: Uma Krishnamurti, MD, PhD, Department of Pathology and Laboratory Medicine, Allegheny General Hospital, Allegheny Health Network, 320 East North Ave., Pittsburgh, PA 15212 (e-mail: [email protected]).