Correction to: BMC Health Serv Res 22, 247 (2022)
https://doi.org/10.1186/s12913-022-07573-7
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Following publication of the original article [1], it was found that information on shared authorship was accidentally missing. The correct information is as follows: Achim Siegel and Werner Vach share the last authorship.
The author group has been updated above and the original article [1] has been corrected.
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