1. Department of Clinical Studies; School of Veterinary Medicine; University of Pennsylvania; Philadelphia; PA; USA
2. Department of Pathobiology; School of Veterinary Medicine; University of Pennsylvania; Philadelphia; PA; USA
3. Department of Pathology and Laboratory Medicine; Perelman School of Medicine; University of Pennsylvania; Philadelphia; PA; USA
4. Department of Pathology and Cell Biology; Columbia University College of Physicians and Surgeons - New York Presbyterian Hospital; New York; NY; USA