I found out about it on a thread on this website. I found his patent and read it and saw that he was using PRP and then I found a couple of medical journal publications that implicated something called IGF-1 in sensory hair cell regeneration and IGF-1 is in PRP. This made sense to me because growth factors in platelets are what heals wounds in the first place. https://en.wikipedia.org/wiki/Platelet-rich_plasma https://www.ncbi.nlm.nih.gov/pubmed/25937136 https://www.researchgate.net/public...n_the_Progression_of_Age-Related_Hearing_Loss I also found out that he was treating anosmia and I assumed and later verified that he was using PRP in that treatment. I found another article, strangely, in the International Tinnitus Journal that showed that PRP injections into the nose can regenerate olfactory sensory epithelium and restore smelling. The stem cells in the nose for that are LGR5+ progenitors, the same type that are in our cochlea that drugs like FX-322 are targeting to regenerate cochlear hair cells. http://www.tinnitusjournal.com/articles/anosmia-treatment-by-platelet-rich-plasma-injection.html https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4051978/ Dr. Shim was treating anosmia with PRP a full year before that article was published. Basically, there is ample evidence that IGF-1 can target and regenerate cochlear hair cells. If you decide to go to Korea please keep us updated. If you need any advice about how to get around or navigate the train just message me and I can advise. I stayed here: https://www.airbnb.com/rooms/16534151?guests=1&adults=1 It's a 15 minute walk to the clinic from there and there's a big supermarket and some really good restaurants very nearby. 10 months.