DOI: 10.1055/s-00000094

Zeitschrift für Gastroenterologie

References

Sprangers MAG, Cull A, Bjordal K, Groenvold M, Aaronson NK.
The European Organization for Research and Treatment of Cancer approach to quality of life assessment: guidelines for developing questionnaires modules. 
Qual Life Res 1993; 2: 287-295  

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