1. Computer Systems Research Institute, University of Toronto, Toronto, Ontario, Canada M5S 1A4
2. Rehabilitation Engineering, Tufts University School of Medicine, Tufts-New England Medical Centre, 171 Harrison Ave., Box 75K/R, Boston MASS
3. Principal Research Scientist, Mechanical Engineering Dept., Room 3-137, MIT, 77 Massachusetts Ave, Cambridge MASS
4. Rehabilitation Engineering Center, Electronic Industries Foundation, 1901 Pennsilvania Ave. N.W., Suite 700, Washington, DC
5. Rehabilitation Engineer, Hugh MacMillan Medical Centre, 350 Rumsey Road, Toronto, Ontario, M4G 1R8