From the *Rheumatology Unit, Internal Medicine Department, and University Institute; and †Radiology Department, Hospital Italiano de Buenos Aires; and ‡Fundacion Dr Pedro M. Catoggio para el Progreso de la ReumatologĂa, Buenos Aires, Argentina.
The authors declare no conflict of interest.
Correspondence: Santiago Ruta, MD, Juan D. PerĂłn 4190 (C1181ACH) Buenos Aires, Argentina, SecciĂłn ReumatologĂa, Servicio de ClĂnica MĂ©dica, Hospital Italiano de Buenos Aires, Argentina. E-mail: santiago.ruta@hospitalitaliano.org.ar.