Levinger P, Diamond NT, Menz HB, Wee E, Margelis S, Stewart AG, Bartlett JR, Bergman NB, McMahon S, Hare DL, Hill K. Development and validation of a questionnaire assessing discrepancy between patients' pre-surgery expectations and abilities and post-surgical outcomes following knee replacement surgery. Knee Surg Sports Traumatol Arthrosc. 2016 Oct; 24(10):3359-3368.