New rules fight back injuries.
D000328:Adult; D019567:Back Injuries; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D008297:Male; D009784:Occupational Diseases / Q000517:prevention & control; D009787:Occupational Medicine / Q000592:standards*; D005082:Physical Exertion; D012737:Sex Factors; D014481:United States