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European Journal of Respiratory Diseases|April 1, 1983
Smoking and influenza in the elderly: a sero-epidemiological studyR Pyhälä, J Takala, A Turunen, et al.
Clinical and Diagnostic Virology|June 1, 1996
Recent influenza B viruses in Europe: a phylogenetic analysisN Ikonen, L Kinnunen, T Forsten, et al.
Scandinavian Journal of Immunology|January 1, 1976
Virus antibody levels in IgA deficiencyR Pyhälä, K Aho, M L Kantanen, et al.
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