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	1.	Etiology of primary headaches: the importance of genes and environment. [electronic resource] by Svensson, Dan A Producer: 20060424 In: Expert review of neurotherapeutics vol. 4 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Lifetime prevalence and characteristics of recurrent primary headaches in a population-based sample of Swedish twins. [electronic resource] by Svensson, Dan A Ekbom, Karl Larsson, Bo Waldenlind, Elisabet Producer: 20021202 In: Headache vol. 42 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	Lifetime prevalence and concordance risk of cluster headache in the Swedish twin population. [electronic resource] by Ekbom, Karl Svensson, Dan A Pedersen, Nancy L Waldenlind, Elisabet Producer: 20060926 In: Neurology vol. 67 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	4.	Shared rearing environment in migraine: results from twins reared apart and twins reared together. [electronic resource] by Svensson, Dan A Larsson, Bo Waldenlind, Elisabet Pedersen, Nancy L Producer: 20030902 In: Headache vol. 43 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	5.	Genetic and environmental influences on expression of recurrent headache as a function of the reporting age in twins. [electronic resource] by Svensson, Dan A Larsson, Bo Waldenlind, Elisabet Pedersen, Nancy L Producer: 20021024 In: Twin research : the official journal of the International Society for Twin Studies vol. 5 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	6.	Genetic and environmental influences on migraine: a twin study across six countries. [electronic resource] by Mulder, Elles J Van Baal, Caroline Gaist, David Kallela, Mikko Kaprio, Jaakko Svensson, Dan A Nyholt, Dale R Martin, Nicholas G MacGregor, Alex J Cherkas, Lynn F Boomsma, Dorret I Palotie, Aarno Producer: 20040120 In: Twin research : the official journal of the International Society for Twin Studies vol. 6 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)