occupational tau silence cadmium mercury dm coronary metal arteriosclerosis breast aerosol methylation alkaloid npo density epidemiologic surgical environmental twin atherosclerosis mineral nocturnal foregut smoking nitrogen atopy suicide socioeconomic uratic subclinical copy adolescence birth mosquitocide mother regional zinc ala vitamin staff infant eating poverty prostate hdl health heavy fatfree paralysis insurance logistic school fasting insecticide lumbar palsy crossmatching community absorptiometry secondhand homocysteine hepatotoxicity cohort pesticide selenium casecontrol dietary exposure mamma toxicity carotid policy organic rare service carcinogenesis disc childhood carbo preventive meal medicine evidencebased cost