Kang, S. Y., Song, W. J., Won, H. K., Chung, S. J., Kim, J. Y., Park, H. W., … Cho, S. (2020). Cough persistence in adults with chronic cough: a 4-year retrospective cohort study. Allergology International, 69(4), 588-593. https://doi.org/10.1016/j.alit.2020.03.012