1 Department of Nuclear Medicine, Marqués de Valdecilla University Hospital, Molecular Imaging Group (IDIVAL), University of Cantabria, Santander, Spain.
2 Department of Rheumatology, Marqués de Valdecilla University Hospital, Epidemiology, Genetics and Atherosclerosis Research Group on Systemic Inflammatory Diseases (IDIVAL), University of Cantabria, Santander, Spain.
3 Cardiovascular Pathophysiology and Genomics Research Unit, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.