Steen Larsen a, Regitze Kraunsøe a, Martin Gram a, Erich Gnaiger b, Jørn W. Helge a, Flemming Dela a a Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health Sciences, University of Copenhagen, 2200 Copenhagen, Denmark b Department of Visceral, Transplant, and Thoracic Surgery, D. Swarovski Research Laboratory, Medical University of Innsbruck, A-6020 Innsbruck, Austria Anal. Biochem. (2013)