Psychometric evaluation of an Italian custom 4-item short form of the PROMIS anxiety item bank in immune-mediated inflammatory diseases: an item response theory analysis oleh Marco Tullio Liuzza, Rocco Spagnuolo, Gabriella Antonucci, Rosa Daniela Grembiale, Cristina Cosco, Francesco Salvatore Iaquinta, Vanessa Funari, Stefano Dastoli, Steven Nistico, Patrizia Doldo