The majority of the 9,098 patients (3,715 males and 5,383 females) interviewed came from Hungary (N = 2,306), followed by Spain (N = 1,994). The remaining patients came from Germany (N = 1,356), Latvia (N = 1,302), Poland (N = 1,197) and Italy (N = 943). The mean age was 44.3 years (standard deviation 13.3 years), ranging between 18 and 64 years. On average the patients received 12.7 years of education (standard deviation 3.6 years) and 13.3 % of the sample was unemployed. Details on patients demographics are reported elsewhere [27].
