1. Rheumatology Service, Hospital Universitario de La Princesa, IIS-Princesa, 28006 Madrid, Spain
2. Nuclear Medicine Service, Hospital Universitario de La Princesa, IIS-Princesa, 28006 Madrid, Spain
3. Radiology Service, Hospital Universitario de La Princesa, IIS-Princesa, 28006 Madrid, Spain
4. Cathedra UAM-Roche, EPID-Future, Department of Medicine, Universidad Autónoma de Madrid (UAM), 28006 Madrid, Spain