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Contributors FB, AC, MA: study concept and design; FB, LM, MP, SC, XB, TO, AS, JG, FM: acquisition of data; FB, LM: analysis and interpretation of data; FB, LM: drafting of the manuscript; MA, AC: critical revision of the manuscript for important intellectual content; FB, LM: statistical analysis.
Competing interests None.
Patient consent Obtained.
Ethics approval IRB of each participating institution.
Provenance and peer review Not commissioned; internally peer reviewed.
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