Schwartz D, Lellouch J (1967)

Explanatory and pragmatic attitudes in therapeutic trials. Journal of Chronic Disease 20:637-48.

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Acknowledgements

The editors are grateful to:

Elsevier Ltd. for making a pdf of this article available (letter to Iain Chalmers from Natalie Qureshi, 01 October 2012). For conditions of further reproduction, see here.