BETA - What are some shortcomings (limitations) of the results obtained from a bone marrow biopsy (BMB) test? What is a liquid biopsy?

BETA - What are some shortcomings (limitations) of the results obtained from a bone marrow biopsy (BMB) test? What is a liquid biopsy?
Do the benefits of a BMT outweigh the risks?
What’s Keeping You Up at Night? Tips to Help You Weather Economic Storms