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Handling editor Josef S Smolen
Contributors MG: study design, data management, analysis, interpretation, verification, writing. MJGdY: study design, analysis, verification, interpretation. IA: data management, interpretation. AMB-G: data management, interpretation. IR-F: data management, interpretation, writing. EL: interpretation, writing. LC: study design, verification, interpretation, writing.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient consent for publication Not required.
Ethics approval Ethical approval for this study was obtained from the ethical committee of the Hospital Universitario de Gran Canaria Dr. Negrín (code 2018-222-1).
Provenance and peer review Not commissioned; externally peer reviewed.
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