Acknowledgments
We thank all the staff from the drug rehabilitation center for their cooperation and support. We also thank all participants for their cooperation and efforts.
Funding
This study was supported by the Xinglin Scholar Project (QJJJ2 021006).
Conflict of interest
There is no conflict of interest in this study.
Author contributions
RFW: designed research, collected data, and conceptualized the study. JZH: conceptualized the study, performed literature review, wrote the article, and revised the article. BT and LL: organized in-vestigation and data curation. JL, CWZ, ZLL, and BBW: provided resources and opinions. All authors contributed to this manuscript and approved the submitted version.
Data availability statement
The raw data supporting the conclusions of this article will be made available by the authors, without undue reservation.
Ethics statement
All experimental processes involving human participants were re-viewed and approved by the review committee of Sichuan Drug Re-habilitation Administration. This study was approved by the ethics committee of Chengdu University of Traditional Chinese Medicine (Ethical approval document No: 2019KL-053) and passed the regis-tration application of China clinical trial registration center (Clinical trial registration No: ChiCTR1900027543). The experimental pro-cedure was in accordance with the ethical principles of the 1964 Declaration of Helsinki. All participants provided informed consent before participation.