Fig. 3From: The Korean undiagnosed diseases program phase I: expansion of the nationwide network and the development of long-term infrastructureSummary of the social data. a Patients nationwide were enrolled in the Korean Undiagnosed Diseases Program (KUDP) and showed a similar regional proportion compared with the general population. b The number of referrals from physicians increased every year. c The number of patients who underwent next-generation sequencing before enrollment increased every yearBack to article page