From the *Departments of Rheumatology,
†Nuclear Medicine, and
‡Radiology, Hospital Clínic Barcelona, Barcelona, Spain.
The corresponding author certifies that all authors approved the entirety of the submitted material and contributed actively to the study.
Correspondence: Nuria Guañabens, MD, PhD, Department of Rheumatology, Hospital Clínic Barcelona, Villarroel 170, PC 08036, Barcelona, Spain. E-mail: firstname.lastname@example.org.