Keywords: زمان سم روبرت راسل را رقیق کنید; antithrombotic therapy; deep venous thrombosis; direct oral anticoagulants; laboratory; pulmonary embolism; AF; atrial fibrillation; APTT; activated partial thromboplastin time; CHEST; American College of Chest Physicians; DOAC; direct oral anticoagulant;