1. From the Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, the Institute of Cell Biology, Chinese Academy of Sciences, and the Chinese National Human Genome Center at Shanghai, Shanghai, China; Clontech Laboratories, Palo Alto, CA; the Division of Neoplastic Diseases, Department of Medicine, Mount Sinai Medical Center, New York, NY; and Institute National de la Santé et de la Recherche Medicalé(INSERM) Unité, Hospital Saint Louis, Paris, France.