What steps do pediatric patients and their families need to take to prepare for a bone marrow transplant?

What steps do pediatric patients and their families need to take to prepare for a bone marrow transplant?
What happens if a child doesn’t have a matching family member? How are unrelated donors found?
What are the different types of bone marrow transplants, and how is a donor selected?
What are the different types of graft versus host disease?
How do doctors decide if a child with AML needs a bone marrow transplant?