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Michael Kelly received honorarium from Wolters Kluwer. Caglar Yilgor is a Consultant for Medtronic. Frank Kleinst\u00fcck did teaching and speaking for DePuy Synthes. Ibrahim Obeid received grants from DePuy synthes and did consulting for DePuy synthes, Medtronic, Clariance, Spineart, Alphatec. Ahmet Alanay received grants from Medtronic, DePuy Synthes is a Consultant for Globus medical and ZimVie. Ferran Pellis\u00e9 is a Consultant for Medtronic and Depuy Synthes.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"Ethical approval was obtained before patient enrollment and data collection protocols. The procedures used in this study adhere to the tenets of the Declaration of Helsinki.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Institutional review board"}},{"value":"All the participating patients gave prior informed consent to their inclusion in this study. 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