Acknowledgements
HEART, LUNG
The support from the Swedish Energy Agency within the ERA-NET Bioenergy program, The Swedish Heart Lung Foundation, Umeå City Council, Riksförbundet HjärtLung and Västerbotten County Council (Spjutspets) is acknowledged. The authors would like to thank Frida Holmström and Annika Johansson for their technical contribution to this project. Lisa Lundin at Umeå University is acknowledged for laboratory assistance in the analysis of PAH. We also would like to express our gratitude to the volunteers participating in this investigation.