Fig. 3From: Prevalence of fibrodysplasia ossificans progressiva (FOP) in the United States: estimate from three treatment centers and a patient organizationPatient identification overlap. The Venn diagram shows the number of the 373 unique patients identified based on source (IFOPA membership list, FOP Registry, and any of the 3 centers). The term “source” refers to the IFOPA membership list, the FOP Registry, and each of the 3 centers represented by FOP expert cliniciansBack to article page