all I know is thai I was a skeptic until my neck pain was unbearable Then I was convinced there was nothing to lose. I wen tonce, felt no different. I went a second time and thought maybe a bit of a change for the better, but maybe I just wanted it. I went a third time in a two week period and the next day an unbearable spasm and pain cycle was broken.
It still seems to work like thqt with a series of hits. I am a believer