1. Optx Corporation, Denver, CO, and Ontario Medical Association and University of Toronto, Toronto, Ontario, Canada
2. Optx Corporation, Denver, CO, and University of Wollongong, New South Wales, Australia
3. Optx Corporation, Denver, CO
4. Optx Corporation, Denver, CO, and Department of Oncology, McGill University, Montreal, Quebec, Canada, and Department of Health Policy, Management, and Evaluation, University of Toronto, Toronto, Ontario, Canada,