1. University of Pavia—Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
2. Laboratory of Genetics, Department of Health Sciences, University of Eastern Piedmont, Novara, Italy
3. Internal Medicine and Therapeutics Department, Paediatric and Adolescent Unit, University of Pavia—Fondazione IRCCS Policlinico San Matteo, Pavia, Italy