1. State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Science, School of Public HealthXiamen University 361102 Xiamen P. R. China
2. Department of Microbiology, Biochemistry and Molecular Genetics, New Jersey Medical SchoolRutgers University
225 Warren Street
070101 Newark NJ USA
3. Department of MicrobiologyHoward University College of Medicine 20059 Washington DC USA