Dr. Divay Chandra and colleagues at Harvard University in Boston looked specifically at venous thromboembolism -- the development of a blood clot in a vein, usually in the legs.

• 波士顿哈瓦德大学的大卫，蝉扎医生和他的同事特别地调查研究了静脉血栓栓塞--静脉凝血块的形成通常在腿上。