What occupations have been associated with brain cancer, and, more specifically, what is the connection between brain cancer and electric utility work?
D001932:Brain Neoplasms / Q000209:etiology* / Q000401:mortality; D016022:Case-Control Studies; D002423:Cause of Death; D004560:Electricity / Q000009:adverse effects*; D004574:Electromagnetic Fields; D006801:Humans; D009784:Occupational Diseases / Q000209:etiology* / Q000401:mortality; D016273:Occupational Exposure / Q000009:adverse effects; D012307:Risk Factors