Article History
First Online: 24 March 2018
Compliance with Ethical Standards
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: J. M. is the Director of the Achtsamkeitsinstitut Ruhr (an institute offering mindfulness training) and Principal Investigator of several DFG (German Science Foundation) research projects. J. M. and T. H. receive royalties from mindfulness books they have authored. Kira Steinhaus declares that she has no conflict of interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This study was approved by the Witten/Herdecke University institutional review board.
: Informed consent was obtained from all individual participants included in the study.