Salaffi, F., Di Carlo, M., Carotti, M., Farah, S., & Gutierrez, M. (2016). The Psoriatic Arthritis Impact of Disease 12-item questionnaire: Equivalence, reliability, validity, and feasibility of the touch-screen administration versus the paper-and-pencil version. Ther Clin Risk Manag.

Salaffi, Fausto, Marco Di Carlo, Marina Carotti, Sonia Farah, and Marwin Gutierrez. "The Psoriatic Arthritis Impact of Disease 12-item Questionnaire: Equivalence, Reliability, Validity, and Feasibility of the Touch-screen Administration Versus the Paper-and-pencil Version." Ther Clin Risk Manag 2016.

Salaffi, Fausto, et al. "The Psoriatic Arthritis Impact of Disease 12-item Questionnaire: Equivalence, Reliability, Validity, and Feasibility of the Touch-screen Administration Versus the Paper-and-pencil Version." Ther Clin Risk Manag 2016.