Department of Pathology, University of Iowa Hospitals and Clinics, University of Iowa Carver College of Medicine, Iowa City, IA

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

All figures can be viewed online in color at www.anatomicpathology.com.

Reprints: Andrew M. Bellizzi, MD, Department of Pathology, University of Iowa Hospitals and Clinics, University of Iowa Carver College of Medicine, 200 Hawkins Drive, Iowa City, IA 52242 (e-mail: [email protected]).