Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan.|Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan.|Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan.|Institute of Statistical Science, Academia Sinica, Taipei, Taiwan.|Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan.|Genome and Systems Biology Degree Program, National Taiwan University and Academia Sinica, Taipei, Taiwan.