Acknowledgements
The NMR analyses were undertaken at the MR Core Facility, Norwegian University of Science and Technology (NTNU), funded by the Faculty of Medicine and Health Siences, NTNU and Central Norway Regional Health Authority. We gratefully acknowledge the technical assistance from A. Garnham, S. Pinto and B. Radford from the Mary MacKillop Institute for Health Research, the Australian Catholic University, and from Trygve Andreassen at the MR Core Facility, NTNU. We also thank the participants for their time commitment and heroic efforts in completing the study protocols.