School of Automation, Northwestern Polytechnical University, Xian, China.|Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.|School of Computer Science and Engineering, Xian University of Technology, Xian, China.|Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.|Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, USA.|School of Automation, Northwestern Polytechnical University, Xian, China.|Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, USA.|Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.|Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.