DOI:
10.1055/s-00000094
Zeitschrift für Gastroenterologie
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References
Atkins D, Eccles M, Flottorp S. et al.
Systems for grading the quality of evidence and the strength of recommendations I: critical appraisal of existing approaches The GRADE Working Group.
BMC Health Serv Res 2004; 4: 38-
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