Fig. 1From: Quality appraisal for systematic literature reviews of health state utility values: a descriptive analysisPRISMA flow diagram summarising the study selection process. HRQOL, Health Related Quality of Life; PRO, Patient Reported Outcomes; CEA, cost-effectiveness analysis; CUA, cost-utility analysis; PRISMA, Preferred Reporting Items for Systematic Review and Meta-Analyses; SLR, Systematic Literature ReviewBack to article page