To begin with I didn't say they dealt with CTKH, I said that CTKH could supply the kind of very specialize materials they use. As to why they might deal with CTKH, it might be because of the quality of what CTKH produces.
If you take a look at the company you might find they're in a very interesting and different niche of medicine. I really don't know much about it, but I'd like to learn more.