Psychological morbidity and chronic cough: which is predominant? A comparison of clinical characteristics.

"The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article."

"Funding: The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This study was supported by the National Natural Science Foundation of China (grant no. 82270114, 82070102, and 81800097), the Project of Science and Technology Commission of Shanghai Municipality (grant no. 22Y11901300, 21Y11901400, and 20ZR1451500), the Program of Shanghai Academic Research Leader (grant no. 22XD1422700), the Fund of Shanghai Youth Talent Support Program, the Fund of Shanghai Municipal Health Commission for Excellent Young Scholars (grant no. 2018YQ01), and the Shanghai Sailing Program (grant no. 19YF1444100)."

"Trial registration: The protocol was registered in the Chinese Clinical Trials Register (http://www.chictr.org.cn/) [ChiCTR2000037429]."