[1] Univ Brescia, Dept Med & Surg Specialties Radiol Sci & Publ Hlt, Brescia, Italy
[2] Univ Milan, Sect Publ Hlth, Dept Biomed Sci Hlth, Milan, Italy
[3] Univ Lugano, Inst Commun & Hlth, Lugano, Switzerland
[4] Univ Brescia, Dept Econ & Management, Brescia, Italy