Background: Despite calls for the use of real-world data. the rare diseases (RD) treatment landscape suffers from a scarcity of data referred to orphan medicinal products (OMP) use at the population level. Objectives: We aim to describe the characteristics and patterns of utilization of OMP in a sizable group of RD patients globally monitored by an area-based rare diseases registry lo... https://www.isbasvurusuyap.com/product-category/egg-rings/