Funding for this research was provided by:
Text and Data Mining valid from 2018-04-25
First Online: 25 April 2018
Compliance with Ethical Standards
: Tatjana van Strien receives royalties for the DEBQ and its manual.
: This article contains studies/experiments with human subjects performed by the author. All reported studies/experiments have been previously published and complied with all applicable ethical standards (including the Helsinki declaration and its amendments, institutional/national research committee standards, and international/national/institutional guidelines).