Acknowledgements
We would like to thank Prof. Dongyan Wang (PhD, doctoral supervisor, chief physician, professor, vice president of the Second Affiliated Hospital of Heilongjiang University of Chinese Medicine and the inventor of the instrument in this trial) for the important guidance and monitoring in this trial. We also give many thanks to the review of the Ethics Committee of the Second Affiliated Hospital of Heilongjiang University of Chinese Medicine and the help of the staff from Acupuncture and Moxibustion Ward 3 of the Second Affiliated Hospital of Heilongjiang University of Chinese Medicine. Special thanks to all the participants in this study.