Laboratory of Bioinformation Engineering, Institute of Basic Medical Sciences, P.O. Box 130 (3), Beijing 100850, China.|Laboratory of Bioinformation Engineering, Institute of Basic Medical Sciences, P.O. Box 130 (3), Beijing 100850, China.|Laboratory of Bioinformation Engineering, Institute of Basic Medical Sciences, P.O. Box 130 (3), Beijing 100850, China.|Laboratory of Bioinformation Engineering, Institute of Basic Medical Sciences, P.O. Box 130 (3), Beijing 100850, China.