Department of Biostatistics, School of Public Health.|Department of Biostatistics, School of Public Health.|Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL 35294, USA.|Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL 35294, USA.|Department of Bioinformatics and Genomics, University of North Carolina at Charlotte, Charlotte, NC 28223, USA.|Department of Bioinformatics.|Department of Cell Biology, School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China.|Department of Bioinformatics and Genomics, University of North Carolina at Charlotte, Charlotte, NC 28223, USA.|Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL 35294, USA.