1. Department of Molecular Microbiology and ImmunologyKeck School of Medicine, University of Southern California, Los AngelesCalifornia
2. Department of Microbiology and Molecular GeneticsUPMC Hillman Cancer Center, University of PittsburghPittsburgh Pennsylvania
3. Laboratory of Human Virology and Oncology, Shantou University Medical College, ShantouGuangdong China