1. SIMCON Solutions LLC, 5041 Lahoma St., Dallas, TX 75235, USA,
2. Edward P. Fitts Department of Industrial and Systems Engineering, North Carolina State University, Raleigh, NC 27695-7906, USA
3. Department of Surgery, Division of Surgery Oncology, University of Michigan Health Systems, Ann Arbor, MI 48109-5932, USA
4. Departments of Radiology and Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27516-9510, USA