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22. Helicobacter pylori infection: genetic and environmental influences. A study of twins. Malaty HM, Engstrand L, Pedersen NL, Graham DY. Ann Intern Med; 1994 Jun 15; 120(12):982-6. PubMed ID: 8185146 [Abstract] [Full Text] [Related]
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32. The role of heredity in late-onset Alzheimer disease and vascular dementia. A twin study. Bergem AL, Engedal K, Kringlen E. Arch Gen Psychiatry; 1997 Mar 01; 54(3):264-70. PubMed ID: 9075467 [Abstract] [Full Text] [Related]
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