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Theories are built using multiple pieces of data from several sources, secondary data in the case of realist review and primary data in realist evaluation, and moving from theorising at a level close to the data explaining occurrences in the particular studies under consideration and then moving to higher, more generalisable levels of abstraction through iterative rounds of theory building

The health consequences of smoking: 50 years of progress: A report of the surgeon general

This inflammatory phenomenon was related to a reduction of metabolic activity of endothelial cells (191)

It needs a behavioral replacement: something for the hands and mouth to do when the trigger fires