HEALTH TOPICS 
References for “A SAD story: Seasonal affective disorder”
Axelsson J et al, "Seasonal affective disorders: relevance to Icelandic and Icelandic-Canadian evidence to etiologic hypotheses," The Canadian Journal of Psychiatry (March 2002), Vol. 47, pp. 153–58.
Bhattacharjee Y, "Is Internal Timing Key to Mental Health," Science (Sept. 14 2007), pp 1488–1492.
To continue reading this article, you must login.
Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.
- Research health conditions
- Check your symptoms
- Prepare for a doctor's visit or test
- Find the best treatments and procedures for you
- Explore options for better nutrition and exercise