How much can nurses handle?
D019567:Back Injuries / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D017770:Lifting / Q000009:adverse effects*; D009520:New Zealand; D024802:Nurse's Role; D009741:Nursing Staff, Hospital / Q000458:organization & administration; D016272:Occupational Health; D016526:Workload