Department of Computer Science and Engineering, The Pennsylvania State University, University Park, PA;Department of Computer Science and Engineering, The Pennsylvania State University, University Park, PA;National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD and Institute of Cytology and Genetics, Russian Academy of Sciences, Novosi ...;National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD;Department of Computer Science and Engineering, The Pennsylvania State University, University Park, PA