1. Canterbury District Health Board; Christchurch New Zealand
2. WHO National Influenza Centre; Institute of Environmental Science and Research; Porirua New Zealand
3. WHO Collaborating Centre for Reference and Research on Influenza; Melbourne VIC Australia
4. Department of Pediatrics; National Taiwan University Children's Hospital; Taipei Taiwan
5. Department of Internal Medicine; Korea University Guro Hospital; Seoul Korea
6. GSK; Singapore Singapore