National spine surgery registries' characteristics and aims: globally accepted standards have yet to be met. Results of a scoping review and a complementary survey.

"Declarations Ethics approval and consent to participateNot applicable. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This study was carried out within the project “Italian implantable prostheses registry (RIPI): realisation of a platform integrating data flows for orthopaedic prostheses, spinal devices, pacemakers and defibrillators, heart valves”, coordinated by the Italian National Institute of Health and supported by the General Directorate of Medical Devices and the Pharmaceutical Service of the Italian Ministry of Health. The participation of the authors Pedro Berjano and Francesco Langella from IRCCS Ospedale Galeazzi-Sant'Ambrogio in this study was supported and funded by the Italian Ministry of Health - "Ricerca Corrente". "