1. Clinical Associate Professor, Department of Orthopedic Surgery and Rehabilitation, Milton S. Hershey Medical Center, Pennsylvania State University; and Department of Surgery, Division of Orthopedics, Lehigh Valley Hospital, Allentown, Pennsylvania.
2. Research Scientist, Institute for Biomedical Engineering and Mathematical Biology, Lehigh University, Bethlehem, Pennsylvania.
3. Professor of Mathematics and Director, Institute for Biomedical Engineering and Mathematical Biology, Lehigh University, Bethlehem, Pennsylvania.