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Handling editor Anna Maria Geretti
Contributors ARR and SN visited the individual and contributed to writing the article. EB contributed to writing the article. VS and DC contributed to the reviewing of the article and literature. AC coordinated clinical activities and contributed to the reviewing of the article. All authors have read and agreed to the published version of the manuscript.
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.
Provenance and peer review Not commissioned; internally peer reviewed.