Fig. 3From: Are supplemental appraisal/reimbursement processes needed for rare disease treatments? An international comparison of country approachesFeatures included in supplemental processes for rare diseases across the HTA process. Illustrates the (unique and/or different) features of supplemental processes to standard ones. They have been categorised according to their occurrence throughout the HTA process. RDT: rare disease treatment; WTP: willingness-to-payBack to article page