Funding for this research was provided by:
Text and Data Mining valid from 2018-12-03
Received: 19 January 2018
Accepted: 22 November 2018
First Online: 3 December 2018
Compliance with ethical standards
: Dr. Hublin reports outside the present work a grant from Finska Läkaresällskapet and from the Finnish Work Environment Fund, and personal fees from the National Institute of Health and Welfare and the Orion Corporation. The other authors have nothing to disclose.
: The study protocol was approved by the Coordinating Ethics Committee of the Hospital District of Helsinki and Uusimaa, and the study was performed in accordance with Finnish law (Medical Research Act 488/99 and its later amendments and Medical Research Decree 986/99 and its later amendments). The data collection followed the requirements of the Helsinki Declaration.
: Written informed consent was obtained from all individual participants included in the study.