Fig. 2From: ORPHAcodes use for the coding of rare diseases: comparison of the accuracy and cross country comparabilityDistribution of ORPHAcodes collected during the study period per disease prevalence class. The value of the disease prevalence class has been attributed to ORPHAcodes for which a reported prevalence was available in the Orphanet nomenclature version 2022 (n = 1640) and according to the method described in [2]Back to article page