[1] Rayos Canc, Seattle, WA USA
[2] CB Oncol, Cutler Bay, FL USA
[3] Mem Sloan Kettering Canc Ctr, Dept Med Phys, New York, NY USA
[4] AUNA, Radioncol Oncosalud, Medellin, Colombia
[5] Ctr Oncol Anna Rocca Bonatti, Curuzu Cuatia, Corrientes, Argentina
[6] Clin Somer, Medellin, Antioquia, Colombia
[7] Univ Washington, Fred Hutchinson Canc Ctr, Dept Radiat Oncol, Seattle, WA USA