Authors:Mark R. Alderson, PATH SeattlePeter D. Arkwright, University of ManchesterXilian Bai, Manchester Royal InfirmarySteve Black, Cincinnati Children's Hospital Medical CenterRay Borrow, Manchester Royal InfirmaryDominique A. Caugant, Norwegian Institute of Public HealthEner Cagri Dinleyici, Eskişehir Osmangazi Üniversitesi Tip FakültesiLee H. Harrison, University of PittsburghJay Lucidarme, Manchester Royal InfirmaryLucy A. McNamara, National Center for Immunization and Respiratory DiseasesSusan Meiring, National Institute for Communicable DiseasesMarco A. P. Sáfadi, Santa Casa de São Paulo School of Medical SciencesZhujun Shao, Chinese Center for Disease Control and PreventionDavid Stephens, Emory UniversityMuhamed-Kheir Taha, Institut Pasteur ParisJulio Vazquez, Centro Nacional de MicrobiologiaBingqing Zhu, Chinese Center for Disease Control and Prevention