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Carl B, Bopp M, Saß B, Pojskic M, Voellger B, Nimsky C.Carl B, et al. Among authors: voellger b.Global Spine J. 2020 Apr;10(2 Suppl):41S-55S. doi: 10.1177/2192568219868217. Epub 2020 May 28.Global Spine J. 2020.PMID: 32528805Free PMC article.