DOI: 10.1055/s-00000022

Das Gesundheitswesen

References

Krueger R, Casey M. Focus Groups.
A practical guide for applied research.
4th ed.
Thousand Oaks: Sage Publications; 2009

Krueger R, Casey M. Focus Groups.
A practical guide for applied research.
4th ed.
Thousand Oaks: Sage Publications; 2009

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