After having described the registry sources (https://pubmed.ncbi.nlm.nih.gov/35303315/), ERCI launched a first feasibility study assessing the percentage of adult patients with primary ITP necessitating a 2nd (at least) line of treatment, and describing these lines. All European prospective registries gathering these data are participating: France, Germany, Italy, Norway, Switzerland and United Kingdom. The analyses will be performed in parallel in each country using the same protocol and statistical analysis plan. Aggregated results will be share for a common publication.
The next step will be to work on individual data linkage, with both regulatory and technical (data harmonization) tasks.