1. Finland VL Kinnula Received;Department of Internal Medicine, University of Oulu,,1990
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4. Viral respiratory tract infection and exacerbations of asthma in adult patients;Beasley, R.; Coleman, E.D.; Hermon, Y.; Holst, P.E.; O'Donnel, T.V.; Tobias, M.;Thorax,1988
5. Association of viral and mycoplasma infections with exacerbations of asthma;Huhti, E.; Mokka, T.; Nikoskelainen, J.; Halonen, P.;Ann Allergy,1974