The Parker Institute, Bispebjerg-Frederiksberg Hospital, University of Copenhagen, Frederiksberg, Denmark. Department of Physical and Occupational Therapy, Bispebjerg-Frederiksberg Hospital, University of Copenhagen, Copenhagen Denmark. Research Initiative for Activity Studies and Occupational Therapy, Research Unit for General Practice, Institute of Public Health, University of Southern Denmark, Odense, Denmark. Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense University Hospital, Odense, Denmark. Department of Radiology, Bispebjerg-Frederiksberg Hospital, University of Copenhagen, Frederiksberg, Denmark. NNF Center for Clinical Metabolic Research, Gentofte Hospital, University of Copenhagen, Hellerup, Denmark. Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark. Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark. Research Unit for Dietary Studies at The Parker Institute, Bispebjerg-Frederiksberg Hospital, University of Copenhagen, Frederiksberg, Denmark. Department of Public Health, Section for General Medicine, University of Copenhagen, Copenhagen, Denmark. Department of Neurology, Bispebjerg-Frederiksberg Hospital, University of Copenhagen, Bispebjerg, Denmark.