Fig. 7From: Nationwide comprehensive epidemiological study of rare diseases in Japan using a health insurance claims databaseHeatmap of the number of diseases by age categories of onset in Orphanet and NDB. The figure shows the relationship between onset categories in Orphanet and the age distribution pattern based on NDB data. The red frames indicate predefined correspondence between both categories. The category “Not applicable” means there are too few patients suffering from a specific disease to calculate the age trendBack to article page