[1] Upmc Hillman Canc Ctr, Dept Radiat Oncol, Pittsburgh, PA USA
[2] Univ Med Ctr Utrecht, Dept Radiat Oncol, Utrecht, Netherlands
[3] Tata Mem Hosp, Dept Radiat Oncol, Mumbai, Maharashtra, India
[4] Loyola Univ Chicago, Dept Radiat Oncol, Maywood, IL USA
[5] Med Univ Vienna, Dept Radiat Oncol, Vienna, Austria
[6] Inst Oncol Ljubljana, Dept Radiat Oncol, Ljubljana, Slovenia
[7] McGill Univ, Dept Radiat Oncol, Montreal, PQ, Canada
[8] Tata Mem Hosp, Arctrec, Mumbai, Maharashtra, India
[9] Aarhus Univ Hosp, Dept Oncol, Aarhus C, Denmark
[10] Univ Calif San Diego, Dept Radiat Oncol, San Diego, CA USA