FIGURE 1.

Map showing the participating centres of the clinical trial network for primary ciliary dyskinesia (PCD-CTN) (red dots). The PCD-CTN consists of 22 trial sites from 12 European countries including >3000 children and adults with PCD. The map was created with R [16] and RStudio [17], the packages “maps” [18], “ggplot2” [19] and “dplyr” [20] were used.