Correspondence: Dr Benini, Department of Pediatrics, University of Padua, via Giustiniani, Padua 35128, Italy (benini@pediatria.unipd.it).
Author Contributions: Study concept and design: Benini and Ferrante. Acquisition of data: Benini and Ferrante. Analysis and interpretation of data: Benini, Ferrante, Po', and Jankovic. Drafting of the manuscript: Benini and Po'. Critical revision of the manuscript for important intellectual content: Benini, Ferrante, Po', and Jankovic. Statistical analysis: Ferrante. Study supervision: Benini and Jankovic.
Financial Disclosure: None reported.