Pfizer Investigational Site, Wakayama, Japan
Pfizer Investigational Site, Chesapeake, Virginia, United States
Pfizer Investigational Site, Trieste, Italy
Pfizer Investigational Site, Luton, United Kingdom
Pfizer Investigational Site, St. Gallen, Switzerland
Le Bonheur Children's Hospital, Memphis, Tennessee, United States
Hospital de Niños "Dr. Ricardo Gutiérrez", Buenos Aires, Argentina
Hospital General Interzonal "Dr. José Penna", Buenos Aires, Argentina
Pfizer Investigational Site, Glasgow, United Kingdom
Royal Children's Hospital, Herston, Queensland, Australia
Department of Paediatrics and Child Health, Woden, Australia
National Centre for Immunisation, Westmead, Australia
Pfizer Investigational Site, Brown Deer, Wisconsin, United States
Pfizer Investigational Site, North Adelaide, South Australia, Australia