Flexibility in the Modelling of Comparative Effectiveness in the Absence of Head-to-Head Comparisons in the NICE Single Technology Appraisal of Fenfluramine for Treating Seizures Associated with Lennox-Gastaut Syndrome: An External Assessment Group Perspective. - Fernández Coves A; Scholte M; Wolff R; Perry M; Sugden B; Chen J; Armstrong N; Joore M; Witlox W (PharmacoEconomics, 2026)