ISI, USA(1997): SCI (Science Citation Index) Papers: Three tops of research fields Nol: Signal transduction; No2: Cell apoptosis; No3: Genome and post-genomic analysisISI, USA(1997) : SCI（Science Citation Index）Papers: Three tops of research fields: No1: Signal transduction； No2: Cell apoptosis； No3: Genome and post-genomic analysis