Counting the cost of sickness.
D000041:Absenteeism; D001416:Back Pain / Q000517:prevention & control; D003365:Costs and Cost Analysis; D006801:Humans; D009741:Nursing Staff, Hospital / Q000191:economics*; D009784:Occupational Diseases / Q000191:economics*; D009786:Occupational Health Services / Q000191:economics*