Did the evidence-based intervention (EBI) programme reduce inappropriate procedures, lessen unwarranted variation or lead to spill-over effects in the National Health Service? oleh Joel Glynn, Timothy Jones, Mike Bell, Jane Blazeby, Christopher Burton, Carmel Conefrey, Jenny L. Donovan, Nicola Farrar, Josie Morley, Angus McNair, Amanda Owen-Smith, Ellen Rule, Gail Thornton, Victoria Tucker, Iestyn Williams, Leila Rooshenas, William Hollingworth