The standards for double-blind medical tests are very high.
I am intrigued by the cold studies, because, as you say, they seem plausible and generally, harmless.
Thanks for all your work.
There is a cryo place nearby that has -110 C / -166 F temperatures without wind and can add wind to reduce the effective temperature another 40 degrees F.
The cost for 10 sessions, just like this study? $250 total.
I may be doing this.