When it comes to medicine, the understanding of what is best for a patient can change over time due to new advances made in research, clinical trials and the like. Even so, many practices and products are adopted with little testing, leading to what a hematologist-oncologist at Oregon Health & Science University (OHSU) described as a vast amount of medical reversals. Dr. Vinay Prasad joined us to discuss medical reversal on "Take Care," he's an associate professor of medicine at OHSU and co