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Contributed equally to this work with:
* E-mail: email@example.com
Department of Medical Psychology, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
Kaufmännische Krankenkasse—KKH, Hannover, Germany
University Medical Centre Freiburg, Freiburg, Germany
Department of Health Economics and Health Services Research, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
¶‡ These authors also contributed equally to this work.
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