In the past, life science companies went through numerous clinical trial phases before gaining market approval and launching their products. Once those products were on the market, testing them was seldom a concern. However, in recent years, the necessity of proving that a drug works in the real world has become vital for a number of reasons. Todd Middleton at Cutting Edge Information discusses that among other goals, these studies assist in maintaining marketing authorisation, earning product reimbursement, collecting real-world evidence and improving market share.