Funding for this research was provided by:
The Swedish Research Council
Swedish Heart and Lung Association
The Swedish Heart Lung Foundation
The Swedish Cancer Society
The Swedish Research Council for Health, Working Life and Welfare
County Council of Vastmanland, Sweden
County Council of Stockholm, Sweden
Text and Data Mining valid from 2018-08-28
Received: 22 February 2018
Accepted: 16 August 2018
First Online: 28 August 2018
: Eva Nohlert, PhD, DDS; John Öhrvik, PhD, professor in Biostatistics; Ásgeir R Helgason, PhD, associate professor in Psychology.
: The study was approved by the Ethics Committee at Karolinska Institutet (Dnr 00–367).
: Not applicable.
: The authors declare that they have no competing interests.
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