Effect of compound Rhizoma Coptidis capsule on expression of transforming growth factor-β1 and type Ⅳ collagen proteins in renal tissue of diabetic rats with nephropathy Effect of Tongluo Xingnao effervescent tablets on learning and memory dysfunction in rats with chronic cerebral ischemia Effects of Danshen Injection on serum trace elements and myocardial pathomorphology in dogs with acute myocardial infarction