1 Department of Health Services, Policy and Practice, Brown University School of Public Health, Providence, RI, USA.
2 Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland.
3 Center for Bone Quality, Division of Endocrinology, Department of Internal Medicine, Leiden University Medical Center, Leiden, The Netherlands.
4 Rheumatic Disease Unit, Western General Hospital, NHS Lothian.
5 Rheumatology and Bone Disease Unit, Centre for Genomic and Experimental Medicine Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, UK.