Guillaume Moulis is Professor of Internal Medicine and Clinical Immunology, head of the referral center for autoimmune for autoimmune cytopenias at Toulouse University hospital, south of France. He obtained his medical degree in Toulouse, France. He gives care to patients with general symptoms, autoimmune diseases, and particularly non-malignant hematological diseases like ITP and other platelet disorders. He is also a researcher in epidemiology and pharmacoepidemiology. He obtained his MSc and PhD degrees in pharmacoepidemiology in Bordeaux and Toulouse, with a post-doctoral fellowship in epidemiology at Aarhus University, Denmark. He develops cohorts of patients with rare diseases like ITP to better understand their epidemiology, as well as the real-world use, effectiveness and safety rare diseases treatments. He is one of the founding members of the European Research Consortium for ITP (ERCI) and coordinates the ERCI initiative for ITP registry harmonization in Europe.