Grigoris T. Gerotziafas is Chair of Thrombosis and Haemostasis Department in the Service d’Hématologie Biologique of Tenon University Hospital in Paris, France and the research group Cancer Hemostasis and Angiogenesis in INSERM U938 at the Faculté de Médecine – Sorbonne Université. He is Associate Professor of Hematology, Faculty of Medicine –Sorbonne University, Paris. He is specialized in Hematology – Blood Coagulation Disorders. He is Visiting Professor in Loyola Faculty of Medicine, Chicago and at the School of Medicine at Hofstra and Northwell New York USA. He is Member of the Board of VAS – European Independent Foundation in Angiology and Vascular Medicine. His main expertise are Cancer associated Thrombosis, Thrombophilia and Antithrombotic Treatment.