1. Nuclear and Radiological Engineering and Medical Physics Programs; The George W. Woodruff School of Mechanical Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA
2. Landauer Medical Physics; 2 Science Road Glenwood IL 60425 USA
3. Department of Radiation Oncology; Cancer Treatment Centers of America - Southeastern Regional Medical Center; 600 Celebrate Life Parkway Newnan GA 30265 USA
4. Department of Modern Physics; School of Physical Sciences; University of Science and Technology of China; Hefei China