Fig. 1From: Is real world evidence influencing practice? A systematic review of CPRD research in NICE guidancesFlowchart for the systematic review following the PRISMA methodology. 297 documents in total were identified from four bibliographic databases, of which 293 were not duplicates. Following screening, 178 documents were excluded as they were not a guidance or guideline. A further 90 records were excluded based on the other exclusion criteria. 25 documents were included in the final reviewBack to article page