8Day Robert A. How to write & publish a scientific paper [ M]. 5th ed. Phoenix: The Oryx Press, 1998:209-210.
9Zeiger M. Essentials of writing biomedical research papers [M]. New York: Mcgraw-Hill Co, 1991:278.
10Schouten O, Boersma E, Sanne E, et al. Fluvastatin and perioperative events in patients undergoing vascular surgery[ J]. N Engl J Med,2009,361 (10) :980--989.