[1] Department of Electrical and Computer Engineering, University of Delaware, Newark, DE 19716, United States
[2] Dipartimento di Elettrotecnica Elettronica Informatica, University of Trieste, Via A. Valerio, 10, Trieste 34127, Italy
[3] Cancer Genomics Laboratory, University of Texas M. D. Anderson Cancer Center, Box 85, 1515 Holcombe Blvd., Houston, TX 77030, United States