The prevalence of seasonal affective disorder is low among descendants of Icelandic emigrants in Canada.

OBJECTIVE To examine whether a genetic selection within the Icelandic population helps it to adapt to the long arctic winter. PARTICIPANTS AND SETTING The target population was a group of adults in the Interlake district of Manitoba, Canada, wholly descended from Icelandic emigrants. The ancestry of every individual in this group can be traced back to… CONTINUE READING