Article Text
Letter
Letter in reply to 'Evidence pyramids' from Dr Kaufmann
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Dr Kaufmann makes an important point that quality varies in primary studies and that one should be sceptical when reading the medical literature. Systematic review of poor quality evidence does not make that evidence more valid. Dr Kaufmann suggests that by reviewing the primary …
Footnotes
Competing interests None declared.
Provenance and peer review Not commissioned; internally peer reviewed.