1. a Department of Mechanical, Industrial and Nuclear Engineering University of Cincinnati Cincinnati OH 45221-0072 USA
2. b Center for Industrial Ergonomics Lutz Hall, Room 445, University of Louisville Louisville KY 40292 USA
3. c College of Nursing University of Cincinnati Cincinnati OH 45221-0038 USA
4. d Orthopaedic Diagnostic and Treatment Centre 629 Oak Street, Suite 208 Cincinnati OH 45206 USA