Nearly half of medical procedures may not be based on sound science. That\u2019s according to Eric Patashnik, director of Brown University\u2019s public policy program. And he says it\u2019s not necessarily your doctor\u2019s fault. How did we get to this point? We put that question to Patashnik, who is co-author of the new book, \u201cUnhealthy Politics: The Battle over Evidence-Based Medicine.\u201d