1. Departments of Public Health, University Federico II of Naples, 80131 Naples, Italy
2. Department of Health Promotion, Maternal-Childhood, Internal Medicine of Excellence “G. D'Alessandro,” PROMISE, University of Palermo,
Palermo 90127, Italy
3. Pathology Laboratories, Children's Hospital of Eastern Ontario, University of Ottawa, 401 Smyth Rd., Ottawa, Ontario K1H 8L1,
Canada