Clinical study on treatment of carotid atherosclerosis with extraction of Polygoni Cuspidati Rhizoma et Radix and Crataegi Fructus:a randomized controlled trial Effect of combination of Yindan Xinnao Tong Soft Capsule and atorvastatin, Clopidogre Tablets on blood lipid, carotid artery plaque, and neurological function recovery in patients of acute cerebral infarction with type 2 diabetes