Development and validation of an OMERACT ultrasound scoring system for the extent of calcium pyrophosphate crystal deposition at the joint level and patient level

Silvia Sirotti, Lene Terslev, Emilio Filippucci, Annamaria Iagnocco, Ingrid Möller, Esperanza Naredo, Florentin Ananu Vreju, Antonella Adinolfi, Fabio Becce, Hilde Berner Hammer, Tomás Cazenave, Edoardo Cipolletta, Sara Nysom Christiansen, Andrea Delle Sedie, Mario Díaz, F. Figus, Péter Mandl, Daryl MacCarter, Mohamed Mortada, Gaël Mouterde, Francesco Porta, Anthony M. Reginato, Wolfgang Schmidt, Teodora Şerban, Richard J. Wakefield, Pascal Zufferey, Piercarlo Sarzi‐Puttini, Anna Zanetti, Arianna Damiani, Carlos Pineda, Helen Keen, Maria Antonietta D’Agostino, Georgios Filippou