Except it’s not a placebo and it has actually been shown to have an effect on the human mind, there is a difference between thinking you’re getting better and actually getting better. Placebo can only make you think that you’re getting better, there is no actual measurable effect. Which is not the case with hypnosis.
Here’s another Journal, it was in my previous post, but admittedly I got the link wrong at first and had to edited in, so I don’t know that you actually saw it, unless you mean another site entirely in which case why not just say so?
And I have no idea what you mean by an impact factor, I have never heard this term before when discussing these kinds of things.
If you want documentation on hypnosis being used to treat smoking and irritable bowel syndrome, I can provide that too.