Figure 3. Distribution of RP inheritance patterns in different countries. The data are based on the following publications: the United States [45], Maine (the United States) [32], France [46], Denmark [33], the United Kingdom [47], and Shanghai (China) [48]. In some reports, the inheritance pattern could not be clearly established for some of the families, and we therefore corrected the percentage data accordingly. The data of the current study are presented based on family history as well as a revised distribution following results obtained in the genetic analysis.