Christopher C Yang1, Pierangelo Veltri2. 1. College of Computing and Informatics, Drexel University, 3401 Market Street 318, Philadelphia, PA 19104, USA. Electronic address: ccy24@drexel.edu. 2. Bioinformatics Laboratory, Surgical and Clinical Science Department, Magna Graecia University of Catanzaro, Viale Europa, 88100 Catanzaro, Italy.