title: Environmental influences in heritable illness.
mesh_terms: D000755:Anemia, Sickle Cell / Q000235:genetics; D001249:Asthma / Q000276:immunology; D005075:Biological Evolution; D004777:Environment; D030342:Genetic Diseases, Inborn; D006073:Gout / Q000209:etiology; D006579:Heterozygote; D006801:Humans; D006967:Hypersensitivity; D008288:Malaria / Q000276:immunology; D011110:Polymorphism, Genetic; D011687:Purines / Q000378:metabolism; D012868:Skin Abnormalities; D012871:Skin Diseases / Q000453:epidemiology
chemical_list: D011687:Purines