FIGURE 1.

Countries in Europe with established national population-based registries or multicentre cohort studies and data flow between them and the international primary ciliary dyskinesia (iPCD) Cohort and the International PCD Registry. Yellow ovals: clinical cohorts; green ovals: population-based registries; black continuous lines: data contribution; black dashed lines: data sharing and collaborations; black stars: other European countries that contribute data to the International PCD Registry; black circles: other European countries that contribute data to the iPCD Cohort.