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That publication contained no data on facet arthropathy. Other publications from the original RCT included baseline and 2-year data [] and also reliability data [, ], but not any CT data and not any data on facet arthropathy evaluated using the same system as in the present manuscript. The most relevant earlier reports are referenced in the manuscript [, , , ].","order":7,"name":"Ethics","group":{"name":"EthicsHeading","label":"Study subjects or cohorts overlap"}},{"value":"\u2022 retrospective\u2022 cross-sectional study\u2022 multicenter study","order":8,"name":"Ethics","group":{"name":"EthicsHeading","label":"Methodology"}}]}}