Seong-Cheon Woo

Loading metrics Open Access Study Protocol Citation: Woo S-C, Lyu YR, Kang B-K, Seo B-N, Kim A-R, Lee B, et al. (2026) Efficacy and safety of Galgeun-tang-ga-cheongung-sinyi for nasal congestion with common cold: A study protocol for randomized, double-blind, placebo-controlled, parallel, multicenter clinical trial. PLoS One 21(2): e0342433.

1 Introduction Recently, the incidence of respiratory diseases has increased owing to rapid industrialization and climate change. Urban air pollutants, including particulate matter, ozone, and nitrogen dioxide, have negative effects on allergic respiratory diseases, such as allergic rhinitis and asthma (D'Amato et al. 2013).

All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.