[1] Univ Turin, Sch Med, Citoimmunodiagnost Lab, Dept Publ Hlth & Pediat Sci, Turin, Italy
[2] Univ Turin, Regina Margherita Childrens Hosp, Dept Pediat, Unit Infect Dis, Turin, Italy
[3] Univ Turin, Dept Publ Hlth & Pediat, Unit Complex Struct Neonatol, Turin, Italy