1. Georgia Institute of Technology,H. Milton Stewart School of Industrial and Systems Engineering,Atlanta,GA,USA,30332-0205
2. Gebze Technical University,Department of Industrial Engineering,Gebze,Turkey,41400
3. Memorial Sloan Kettering Cancer Center,New York,NY,USA,1275
4. North Carolina State University,Edward P. Fitts Department of Industrial and Systems Engineering,Raleigh,NC,USA,27695-7906