Paolo Ghirri*, Annalisa Liumbruno, Sara Lunardi, Francesca Forli, Antonio Boldrini, Angelo Baggiani and Stefano Berrettini
* Corresponding author: Paolo Ghirri pghirri@med.unipi.it
Italian Journal of Pediatrics 2011, 37:16 doi:10.1186/1824-7288-37-16