Have there been any studies done proving LG Hanger works? If so, what are the details/what were the results?

Yes, the LG Hanger is being manufactured for Alexander A. Krakovsky, MD, PhD, DrSc, FAAPS
In 3 1/2 years right around 160 (surgery patients) have benefited from this device, in addition to its commercial availability.  Favorable feedback from my students has been approximately 10 to 1.
I currently have two MD’s (Medical Doctors) using this device, they have been very pleased.