Kinds, M. B.; Marijnissen, A. C.; Bierma-Zeinstra, S. M.; Bijlsma, J. W.; Vincken, K. L.; Viergever, M. A.; Lafeber, F. P.; Welsing, P. M. Detection of Progression of Radiographic Joint Damage in Case of Very Early Osteoarthritis: Sensitivity to Change of Quantitative Analysis Compared to Qualitative Grading. Rheumatol Rep 2012, 4, e9.