1. Personal communication;Allison,1993
2. American Heart Association statement on the prevention of bacterial endocarditis;JAMA,1990
3. American Society of Anesthesologists: New classifications of physical status;Anesthesiology,1963
4. Americans With Disabilities Act. Public Law 101–336. Federal Register, July 26, 1990
5. A Guide to Physical Examination and History Taking;Bates,1991