1. Department of Bio-Medical Sciences; University of Catania; Catania Italy
2. Department of Pathology and Laboratory Medicine; School of Medicine; University of Pennsylvania; Philadelphia PA USA
3. Department G.F. Ingrassia; Section of Anatomic Pathology; University of Catania; Catania Italy
4. Department of Internal Medicine; University of Milan; IRCCS Istituto Auxologico Italiano; Milan Italy
5. Inovio Pharmaceuticals, Inc.; Blue Bell PA USA