Survey of claims of no effect in abstracts of Cochrane reviews.
Alderson
Phil
P
UK Cochrane Centre, NHS Research and Development Programme, Oxford OX2 7LG. palderson@cochrane.co.uk
Chalmers
Iain
I
D000043:Abstracting and Indexing / Q000592:standards*; D015984:Causality; D019317:Evidence-Based Medicine / Q000592:standards*; D012196:Review Literature as Topic