1. Dr. P. L. Jurney, Dr. D. E. J. Anderson, Prof. M. T. HindsDepartment of Biomedical EngineeringOregon Health & Science University Portland OR 97239 USA
2. G. Pohan, Prof. E. K. F. YimDepartment of Chemical EngineeringUniversity of Waterloo Waterloo Ontario Canada, N2L 3G1