Influenza, Human

• General Academic Pediatrics — Pittsburgh, Pennsylvania, United States
• University of Pittsburgh Department of Family Medicine — Pittsburgh, Pennsylvania, United States

• GSK Investigational Site — Surrey, United Kingdom

• Clinical Research Institute Saltillo — Saltillo, Coahuila, Mexico
• Centro de Investigacion Clinica del Pacifico — Acapulco de Juárez, Guerrero, Mexico
• AMIC Pachuca — Pachuca, Hidalgo, Mexico
• Instituto Jalisciencie de Metabolismo — Guadalajara, Jalisco, Mexico

• Ivan Hung — Hong Kong

Not specified

• Vanderbilt University Medical Center — Nashville, Tennessee, United States

• Pasteur Institute, Ho Chi Minh City — Ho Chi Minh City, Vietnam

• GSK Investigational Site — Wilrijk, Belgium

• University of California, Los Angeles — Los Angeles, California, United States

• China-Japan Friendship Hospital — Beijing, China