An international, multi-disciplinary Delphi study regarding statements for the definition of spinal osteoarthritis. (April 2021) - de Luca, K.; Chiarotto, A.; Cicuttini, F.; Creemers, L.; de Schepper, E.; Ferreira, P.; Foster, N.E.; Hartvigsen, J.; Kawchuk, G.; Little, C.B.; Oei, E.; Suri, P.; et al.