[1
]
Department of Endodontics, School of Dental Medicine, University of Pennsylvania,
Philadelphia, Pennsylvania. Electronic address: fsetzer@upenn.edu.
[2
]
Private Practice, University of Pennsylvania, Philadelphia, Pennsylvania.
[3
]
School of Computing, Informatics, and Decision Systems Engineering, Arizona State
University, Tempe, Arizona.
[4
]
Department of Oral Medicine, School of Dental Medicine, University of Pennsylvania,
Philadelphia, Pennsylvania.