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ddferrari, you obviously don't work in a healthcare environment. I do, and see reports of injured nurses and aids all the time. Number one injury is muscular-skeletal injuries do to bad lifting of patients, or while trying to stop/guide them from falling. Give nurses a robot able to get a patient from a wheel chair to a bed and back, or to assist them to the toilet, or up and down the hall and you'll make them your slaves for life.