About the Authors
- Niina Lietzén, Tiina Öhman, Tuula A. Nyman
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
- Johanna Rintahaka, Sampsa Matikainen
- Finnish Institute of Occupational Health, Helsinki, Finland
- Ilkka Julkunen
- National Institute for Health and Welfare, Helsinki, Finland
- Tero Aittokallio
- Department of Mathematics, University of Turku, Turku, Finland
The authors have declared that no competing interests exist.
Conceived and designed the experiments: SM TAN. Performed the experiments: NL TÖ JR. Analyzed the data: NL TÖ TA SM TAN. Contributed reagents/materials/analysis tools: IJ TA. Wrote the paper: NL SM TAN.