[1] Univ Debrecen, Fac Hlth, Dept Publ Hlth, Sostoi U 2-4, H-4400 Nyiregyhaza, Hungary
[2] Univ Debrecen, Fac Publ Hlth, Dept Prevent Med, Kassai Ut 26, H-4028 Debrecen, Hungary
[3] GlaxoSmithKline Hungary Ltd, Csorsz U 43, H-1124 Budapest, Hungary
[4] Eotvos Lorand Univ, Inst Econ, Dept Hlth Policy & Hlth Econ, Fac Social Sci, Pazmany Peter Setany 1-A, H-1117 Budapest, Hungary