MICHAEL JOHNSON to Observation
This is a "connection" page, showing publications MICHAEL JOHNSON has written about Observation.
Connection Strength
0.101
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Good research practices for comparative effectiveness research: approaches to mitigate bias and confounding in the design of nonrandomized studies of treatment effects using secondary data sources: the International Society for Pharmacoeconomics and Outcomes Research Good Research Practices for Retrospective Database Analysis Task Force Report--Part II. Value Health. 2009 Nov-Dec; 12(8):1053-61.
Score: 0.080
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Burden of COPD in a government health care system: a retrospective observational study using data from the US Veterans Affairs population. Int J Chron Obstruct Pulmon Dis. 2010 May 06; 5:125-32.
Score: 0.021