Users' guides to the medical literature. X. How to use an article reporting variations in the outcomes of health services. The Evidence-Based Medicine Working Group.
作者信息
Naylor C D, Guyatt G H
机构信息
Institute for Clinical Evaluative Sciences, North York, Ontario, Canada.
出版信息
JAMA. 1996 Feb 21;275(7):554-8. doi: 10.1001/jama.275.7.554.