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2. Pollen counts in the air of Seoul during 88 Olympics [in Korean];Kim;Korean J Allergology,1989
3. Survey of airborne pollinosis in Seoul;Park;J Kor Med Sci,1994
4. A preliminary investigation into the main allergenic pollens during autumnal seasons in Beijing area [in Chinese];Yin;Chinese J Microbiol Immunol,1996
5. Cases of bronchial asthma induced by pollen extract of Humulus japonicus [in Korean];Kim;Korean J Allergology,1987