[1] Univ Cattolica Sacro Cuore, Sect Hyg, Inst Publ Hlth, Fdn Policlin Univ Agostino Gemelli, Lgo F Vito 1, I-00168 Rome, Italy
[2] Univ Cattolica Sacro Cuore, Inst Publ Hlth, Sect Hyg, Lgo F Vito 1, I-00168 Rome, Italy
[3] Univ Naples Federico II, Dept Publ Hlth, Naples, Italy
[4] Univ Naples Federico II, Dept Clin Med & Surg, Internal Med & Clin Nutr Unit, Naples, Italy