Have you ever donated bone marrow? Either through harvesting or via apheresis of peripheral stem cells?

I recently found out a family relative has non hodgkin’s lymphoma and so did some research on bone marrow transplants. I thought that the process was a very painful harvesting of bone marrow. But I found out that there are other minimally invasive ways to donate bone marrow. While I wasn’t a match for my relative, my wife and I considering joining the national bone marrow donors list.