Center in Computation Biology, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.|Center in Computation Biology, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.|Center in Computation Biology, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.|Center in Computation Biology, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.|Center in Computation Biology, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.