“…Such vulnerability has been indicated in increased frequency of manic episodes in those regions compared to frequent depressive episodes reported elsewhere (Bauer et al, 2014;Kohno et al, 2012;Lee et al, 2002;Narayanaswamy et al, 2014;Osher et al, 2000). When BD-II with seasonal course pattern is considered, the higher number of depressive recurrences is in line with similar studies reported elsewhere (Geoffroy et al, 2014;Goikolea et al, 2007).…”