1 Department of Rheumatology and Inflammation Research, Centre for Bone and Arthritis Research, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, 405 30, Sweden
2 Department of Internal Medicine and Clinical Nutrition, Centre for Bone and Arthritis Research, The Sahlgrenska Academy, University of Gothenburg, Vita Stråket 11, Gothenburg, 413 45, Sweden