Dumeier, Henriette Karoline
Richter, Luca Anne
Neininger, Martina Patrizia
Prenzel, Freerk
Kiess, Wieland
Bertsche, Astrid
Bertsche, Thilo
Article History
Received: 15 June 2017
Revised: 27 November 2017
Accepted: 11 December 2017
First Online: 31 January 2018
Compliance with ethical standards
: The study was approved by the Youth Welfare Office.
: The authors declare that they have no conflict of interest.
: Ethical approval was not required because no patients were included in this study.
: Informed consent was obtained from all preschool teachers participating in the study.