DOI:
10.1055/s-00000012
Endoscopy
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References
O'Connor D, Green S, Higgins JPT.
Defining the review question and developing criteria for including studies.
In: Higgins JPT, Green S, (eds.)
Cochrane Handbook for Systematic Reviews of Interventions (Wiley Cochrane Series ).
UK: Wiley-Blackwell; 2008
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