References

One of the top medical references, the Merck Manual, notes that “because of the abundance of scientific evidence backing the benefits of mind-body techniques, many of the approaches are now considered mainstream.” Merck Manual includes the following in their list:

Meditation
Relaxation techniques
Guided imagery
Hypnotherapy (hypnosis)
Biofeedback
https://www.merck.com/mmhe/sec25/ch302/ch302c.html

SmokersInfo.net states that “the patients who chose to participate in a hypnotherapy session were more likely to be non-smokers six months later than patients who chose nicotine replacement therapy (NRT) alone.” In Alternative Methods for Quitting Smoking: Hypnosis, Acupuncture, Meditation at
https://www.smokersinfo.net/alternative-methods-for-quitting-smoking-hypnosis-acupuncture-meditation/

Articles

“Hypnosis May Lower Costs Of Breast Surgery,” Ca Cancer Journal Of Clinicians 58:3-4, 2008
https://caonline.amcancersoc.org/cgi/content/full/58/1/3

Akira Otani, “Eastern Meditative Techniques and Hypnosis: A New Synthesis,” American Journal of Hypnosis October, 2003
https://findarticles.com/p/articles/mi_qa4087/is_200310/ai_n9333525/

J. P. Green, S.J. Lynn, “Hypnosis and suggestion-based approaches to smoking cessation: an examination of the evidence,” International Journal of Clinical and Experimental Hypnosis, 48, no. 2, 2000
https://www.ncbi.nlm.nih.gov/pubmed/10769984?ordinalpos=2&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_DefaultReportPanel.Pubmed_RVDocSum

G. Sorensen, B. Beder, C. Prible, “Reducing Smoking at the Workplace: Implementing a Smoking Ban and Hypnotherapy,” The Journal of Occupational and Environmental Medicine, 37, no. 4, 1995
https://journals.lww.com/joem/Abstract/1995/04000/Reducing_Smoking_at_the_Workplace__Implementing_a.17.aspx