National Institutes of Health Research (UK): Number, HTA 08/56/04
Food and Drug Administration/National Institutes of Health (USA): FDA R01 FD003516
National Institutes of Health (USA) - National Institute of Arthritis and Musculoskeletal and Skin Diseases: U54 AR0573319
National Health and Medical Research Council (Australia): 626939
Canadian Institutes of Health Research (Canada): 211079.