Funding for this research was provided by:
Centre for clinical research, Västmanland Hospital Västerås/Uppsala University Uppsala
The Lennander Foundation, Uppsala
Örebro Universitet
Public dental health service Västmanland county
Public dental health service Örebro county
Article History
Received: 15 October 2017
Accepted: 14 May 2018
First Online: 9 July 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.