OP0223 DEVELOPMENT AND PRELIMINARY VALIDATION OF ULTRASONOGRAPHIC DISEASE ACTIVITY AND DAMAGE SCORES IN PSORIATIC ARTHRITIS PATIENTS: RESULTS FROM THE UPSTREAM (ULTRASOUND IN PSORIATIC ARTHRITIS TREATMENT) STUDYAlen Zabotti, Annamaria Iagnocco, Anna Zanetti et al.|Annals of the Rheumatic Diseases|2021Cited by 2