1. Dept. of Internal Medicine and Cardiology with The Centre of Diagnosis and Treatment of Venous Thromboembolic Disease, Medical University of Warsaw, Warsaw, Poland
2. Dept. of Pulmonary Circulation and Thromboembolic Dieases, European Health Centre Otwock, Medical Centre of Postgraduate Medication, Warsaw, Poland
3. Dept. of Cardiology, Institute of Mother and Child, Warsaw, Poland.