“…Compared to male/female (m/f) ratios reported world- wide [21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40], the sex differential in Spain (m/f rate ratio 2.02, crude m/f ratio 218/119 = 1.83) is the second highest, after that reported in a recent Italian study [22]. The reason for this difference is unknown.…”