Authors’ contributions
GN
WF—study concept, study design, performing intervention, supervision over other investigators performing intervention, interpretation of the results, literature review, manuscript drafting, approval of the final version. GN—data acquisition, interpretation of the results, literature review, revision of manuscript for important intellectual content, approval of the final version. MG—study concept, study design, preparation of study protocol, acquisition of funding, preparation of case report forms, interpretation of the results, literature review, manuscript drafting, approval of the final version. MK1—study design, interpretation of the results; revision of manuscript for important intellectual content, approval of the final version. JS—data acquisition, follow-up, revision of manuscript for important intellectual content, approval of the final version. ZL—study design, statistical analyses, revision of manuscript for important intellectual content, approval of the final version. MK2—data acquisition, follow-up, revision of manuscript for important intellectual content, approval of the final version. WP—data acquisition, interpretation of the results, revision of manuscript for important intellectual content, approval of the final version. KZ—postoperative follow-up, interpretation of the results, organizational support, revision of manuscript for important intellectual content, approval of the final version. All authors read and approved the final manuscript.