title: Genetic and environmental effects on disease: on "association" in the study of disease etiology.
mesh_terms: D000437:Alcoholism / Q000209:etiology / Q000235:genetics*; D000818:Animals; D004314:Down Syndrome / Q000097:blood; D000882:Haplorhini; D006509:Hepatitis B / Q000209:etiology; D006511:Hepatitis B Antigens / Q000302:isolation & purification; D006515:Hepatitis B virus; D006801:Humans; D007918:Leprosy / Q000097:blood; D007945:Leukemia, Lymphoid / Q000097:blood; D008954:Models, Biological
chemical_list: D006511:Hepatitis B Antigens