title: Letter: Need for research for protective measures against chronic chemical injury.
mesh_terms: D002273:Carcinogens; D002908:Chronic Disease; D004781:Environmental Exposure; D006801:Humans; D009369:Neoplasms / Q000139:chemically induced* / Q000517:prevention & control; D009784:Occupational Diseases / Q000517:prevention & control*; D009787:Occupational Medicine; D012106:Research
chemical_list: D002273:Carcinogens