Well Paul. This sounds interesting.
I do know that the ENTs/ Otolaryngologists use Collagen over here for a number of purposes , but I don't really know what they are for.
Our local hospital would not fund the Collagen for Kris so our ENT got their colleagues in Auckland to give us some by the back door method.
It has worked a treat for Kris. So, I really hope you have some success too- albeit for a different purpose.
Tammy