“…The characteristics of the 20 included studies [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ] from 12 different countries are reported in Table 1 . The number of subjects in each study ranged from 100 [ 23 ] to 17,071 [ 24 ]. Seventeen studies reported the percentage of females [ 15 , 16 , 18 , 19 , 20 , 21 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ], which ranged from 23% [ 21 ] to 100% [ 18 ] of subjects.…”