Parent-perceived recurrent pain in children: associations with maternal pain, depressiveness, socioeconomic status, and children's behavioural difficulties.

"Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest."

"The author(s) declare financial support was received for the research, authorship, and/or publication of this article.This publication was supported by LIFE Child—Leipzig Research Center for Civilization Diseases, Paediatric Clinic, University of Leipzig. LIFE is funded by means for the European Union, the free state of Saxony, the European Social Fund (ESF), and the European Regional Development Fund (ERDF). Further, this publication was funded by the Open Access Publishing Fund of Leipzig University supported by the German Research Foundation within the program Open Access Publication Funding."