Future Research Needs for the Comparison of Percutaneous Coronary Interventions with Bypass Graft Surgery in Nonacute Coronary Artery DiseasePrefaceExecutive SummaryBackgroundMethodsResultsDiscussionConclusionReferencesAbbreviationsAppendixesAppendix A Search StrategiesAppendix B Search Prioritization ToolsAppendix C Excluded StudiesAppendix D Methods and Results of Quantitative Analyses