* ^ Cott, Jerry; Joseph R. Hibbeln (February 2001). "Lack of Seasonal Mood Change in Icelanders" (Letter to the Editor). Am J Psychiatry (American Psychiatric Association) 158 (158): 328. doi:10.1176/appi.ajp.158.2.328....
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* ^ Cott, Jerry; Joseph R. Hibbeln (February 2001). "Lack of Seasonal Mood Change in Icelanders" (Letter to the Editor). Am J Psychiatry (American Psychiatric Association) 158 (158): 328. doi:10.1176/appi.ajp.158.2.328. http://ajp.psychiatryonline.org/cgi/content/full/158/2/328. Retrieved on 2008-09-02. "Thus, high levels of fish consumption should be considered a potential etiology for the finding of a lack of seasonal affective disorder among the Icelandic population.". See less 
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