Edit: Thanks, everyone!
I know an incredibly smart senior here near Milwaukee County, WI who’s disabled by MS and has been restricted to using a scooter for years. He’d love to walk again, but I but I don’t know how he can get involved in studies like this: https://www.nature.com/articles/d41586-025-00863-0
All I could find was the ISSCR (Int’l Society for Stem Cell Research), but I don’t think reaching them directly would be fruitful, would it?
Direct with researchers.
Usually thru universities but grants are drying up.
Studies by companies sometimes take participants from volunteering, but usually they start with lists from healthcare workers.
So talk to their doctor and make sure they know about desire to volunteer, check “local” universities and hospitals