“…Health technology assessment (HTA) [18] , as described by Lampe et al [19] , is intended to identify, appraise, and synthesise all available scientific evidence to inform decisions considering 10 different domains: characterisation of the specific health problem and existing current treatment alternatives; description of the technology under scrutiny; evidence on safety, clinical effectiveness (comparative effectiveness), and costeffectiveness; budget impact analysis; ethical analysis; and considerations of organisational, social, and legal issues. In the case of ODs, several of the above-reported domains become critical [9,12,[20][21][22][23][24][25] , feeding an open worldwide debate about the appropriateness of existing HTA methods for health technologies devoted to RDs [26][27][28][29] . Increasingly, considerations of using an extended set of criteria beyond the conventional core assessment of safety, efficacy, and cost-effectiveness is gaining acceptance even among the HTA community [30][31][32] .…”