About the Authors
VTT Technical Research Centre of Finland, Espoo, Finland
VTT Technical Research Centre of Finland, Tampere, Finland
Helsinki University Central Hospital, Helsinki, Finland
Kuopio University Hospital, Kuopio, Finland
Helsinki Medical Imaging Center, Helsinki University Central Hospital, Helsinki, Finland
The authors have declared that no competing interests exist.
Conceived and designed the experiments: JL TH MO. Performed the experiments: TSL KL. Analyzed the data: MSA JK JL MO. Contributed reagents/materials/analysis tools: MK JK KP SK MA KL ER RJ JL TH MO. Wrote the paper: MSA JK TH MO.