1. Department of Internal Medicine and Medical Specialties, A. Bianchi Bonomi Hemophilia and Thrombosis Center, Milan, Italy;
2. Pediatric Unit, San Gerardo Hospital, Monza, Italy; and
3. Pediatric Clinic 1, Department of Pathophysiology and Transplantation, Fondazione IRCCS Ca’ Granda—Ospedale Maggiore Policlinico, Milan, Italy