Dept. of Electrical Enginereering & Computer Science, Vanderbilt University;Dept. of Computer Science, University of Iliinois at Urbana-Champagne;Dept. of Medicine, Northwestern University;Dept. of Electrical Enginereering & Computer Science, Vanderbilt University;Dept. of Electrical Enginereering & Computer Science, Vanderbilt University and Dept. of Biomedical Informatics, Vanderbilt University