Zampelis, V., Ornstein, E., Franzén, H., & Atroshi, I. (2014). A simple visual analog scale for pain is as responsive as the WOMAC, the SF-36, and the EQ-5D in measuring outcomes of revision hip arthroplasty: A prospective cohort study of 45 patients followed for 2 years. Informa Healthcare.

Zampelis, Vasilis, Ewald Ornstein, Herbert Franzén, et Isam Atroshi. A Simple Visual Analog Scale for Pain Is As Responsive As the WOMAC, the SF-36, and the EQ-5D in Measuring Outcomes of Revision Hip Arthroplasty: A Prospective Cohort Study of 45 Patients Followed for 2 Years. Informa Healthcare, 2014.

Zampelis, Vasilis, Ewald Ornstein, Herbert Franzén, et Isam Atroshi. A Simple Visual Analog Scale for Pain Is As Responsive As the WOMAC, the SF-36, and the EQ-5D in Measuring Outcomes of Revision Hip Arthroplasty: A Prospective Cohort Study of 45 Patients Followed for 2 Years. Informa Healthcare, 2014.