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Due to a production error, there was a mistake in affiliation 2. Instead of “Department of Pediatric Hematology Oncology, Meyer Children’s Hospital Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Florence, Italy”, it should be “Department of Pediatric Hematology Oncology, Meyer Children’s Hospital IRCCS, Florence, Italy”.
The publisher apologizes for this mistake.
The original version of this article has been updated.