About the Authors

Carin Ottosson

To whom correspondence should be addressed. E-mail: carin.ottosson@sodersjukhuset.se

Affiliation Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden

Hans Pettersson

Affiliation Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden

Sven-Erik Johansson

Affiliation Center for Family Medicine, Karolinska Institutet, Huddinge, Sweden

Olof Nyrén

Affiliation Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden

Sari Ponzer

Affiliation Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

CO, SEJ, ON, and SP designed the study. CO, HP, SEJ, and ON analyzed the data. CO enrolled patients. All authors contributed to writing the paper.