Criterion validity of ultrasound in the identification of calcium pyrophosphate crystal deposits at the knee: an OMERACT ultrasound study

Georgios Filippou, Anna Scanu, Antonella Adinolfi, Carmela Toscano, Dario Gambera, Raquel Largo, Esperanza Naredo, Emílio Calvo, Gabriel Herrero‐Beaumont, Pascal Zufferey, Christel Madelaine Bonjour, Daryl MacCarter, Stanley Makman, Zachary Weber, F. Figus, Ingrid Möller, Marwin Gutiérrez, Carlos Pineda, Denise Clavijo Cornejo, Héctor García García, Víctor M. Ilizaliturri, Jaime Mendoza Torres, Raúl Pichardo, Luis Carlos Rodriguez Delgado, Emilio Filippucci, Edoardo Cipolletta, Teodora Şerban, Cătălin Cîrstoiu, Florentin Ananu Vreju, D Grecu, Gaël Mouterde, Marcello Govoni, Leonardo Punzi, Nemanja Damjanov, Helen Keen, George A. W. Bruyn, Lene Terslev, Maria Antonietta D’Agostino, Carlo Alberto Scirè, Annamaria Iagnocco