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APA Citation
Munson, S., Raluy-Callado, M., Lambrelli, D., Wasiak, R., Eriksson, D., & Gray, S. (n.d.). clinical burden of pneumonia, meningitis and septicemia in Norway 2 years after 7-valent pneumococcal conjugate vaccine introduction. Scandinavian journal of public health, 43(6), 657–666. http://access.bl.uk/ark:/81055/vdc_100061000479.0x000006