Figure 1

PRISMA flow diagram, showing the overview of the search process . Schematic overview of the various steps involved in the search process, according to the PRISMA guidelines. We read 451 articles about Stickler syndrome, whose content, if relevant, could be included in the discussion. Data from 46 articles, meeting the inclusion criteria of the meta-analysis, are used to provide accurate prevalences about hearing loss in the results section of this article.