1. Division of Endocrinology and Metabolism, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania.
2. Department of Radiology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania.
3. Department of Pathology, Sri Ramachandra Medical College and Research Institute, Tamil Nadu, India.
4. Department of Otolaryngology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania.
5. Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania.