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2. Genetic and environmental contributions to hay fever among young adult twins. Thomsen SF, Ulrik CS, Kyvik KO, von Bornemann Hjelmborg J, Skadhauge LR, Steffensen I, Backer V. Respir Med; 2006 Dec; 100(12):2177-82. PubMed ID: 16650971 [Abstract] [Full Text] [Related]
11. [The significance of genetic and environmental factors for migraine with aura. A genetic epidemiologic study of Danish twins]. Ulrich V, Gervil M, Kyvik KO, Olesen J, Russell MB. Ugeskr Laeger; 2000 Jan 10; 162(2):167-70. PubMed ID: 10647314 [Abstract] [Full Text] [Related]
18. Sex-specific effects for body mass index in the new Norwegian twin panel. Harris JR, Tambs K, Magnus P. Genet Epidemiol; 1995 Jan 10; 12(3):251-65. PubMed ID: 7557347 [Abstract] [Full Text] [Related]