A Study to Compare Severe Asthma Patients Who Start Biologics and Who do Not Start (PROSPECT)

Research Site, Aki-gun Fucyu

Research Site, Asahikawa

Research Site, Bunkyō City

Research Site, Fukuoka

Research Site, Hamamatsu

Research Site, Hiroshima

Research Site, Ikoma

Research Site, Kobe

Research Site, Kumagaya

Research Site, Maebashi

Research Site, Meguro City

Research Site, Nagoya

Research Site, Nangōku

Research Site, Niigata

Research Site, Okayama

Research Site, Osaka

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Research Site, Sagamihara

Research Site, Sayama

Research Site, Shinagawa City

Research Site, Shinjuku

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Research Site, tabashi City

Research Site, Toyoake

Research Site, Tsukubo-gun Hayashima

Research Site, Yamagata

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Research Site, Yonago