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. 2026 Sep 10;13:1853734. doi: 10.3389/fmed.2026.1853734

Figure 1.

Flow diagram of the literature identification and selection process for this structured narrative review. A total of 537 records were identified through PubMed. After screening and eligibility assessment, 103 full-text articles were evaluated. Thirteen articles were excluded because of mixed ectasia populations, insufficient relevant outcomes, or language restrictions. Ninety studies were ultimately included in the narrative synthesis.

Flow diagram of literature identification and selection for this structured narrative review.