The physician and social insurance for railroad workers.
D004185:Disability Evaluation; D004608:Eligibility Determination; D006801:Humans; D007348:Insurance, Health; D008297:Male; D006278:Medicare; D008875:Middle Aged; D009787:Occupational Medicine; D011890:Railroads; D012179:Retirement; D012943:Social Security; D014942:Workers' Compensation