Kougkas, N., Avgoustidis, N., Repa, A., Bertsias, G., Eskitzis, A., & Sidiropoulos, P. (2019). The value of the 2011 ASAS classification criteria in patients with Spondyloarthritis and the prognosis of non-radiographic axial Spondyloarthritis: Data from a large cohort of a tertiary referral hospital. Mediterr J Rheumatol.

Kougkas, Nikolaos, Nestor Avgoustidis, Argyro Repa, George Bertsias, Anastasios Eskitzis, and Prodromos Sidiropoulos. "The Value of the 2011 ASAS Classification Criteria in Patients With Spondyloarthritis and the Prognosis of Non-radiographic Axial Spondyloarthritis: Data From a Large Cohort of a Tertiary Referral Hospital." Mediterr J Rheumatol 2019.

Kougkas, Nikolaos, et al. "The Value of the 2011 ASAS Classification Criteria in Patients With Spondyloarthritis and the Prognosis of Non-radiographic Axial Spondyloarthritis: Data From a Large Cohort of a Tertiary Referral Hospital." Mediterr J Rheumatol 2019.