[1] Med Univ Vienna, Dept Radiat Oncol, Comprehens Canc Ctr, Christian Doppler Lab Med Radiat Res Radiat Oncol, Vienna, Austria
[2] Aarhus Univ Hosp, Dept Oncol, DK-8000 Aarhus C, Denmark
[3] Univ Med Ctr Utrecht, Dept Radiat Oncol, Utrecht, Netherlands
[4] Leiden Univ, Dept Radiat Oncol, Med Ctr, Leiden, Netherlands
[5] Cambridge Univ Hosp Natl Hlth Serv Trust, Addenbrookes Hosp, Dept Oncol, Cambridge, England
[6] Cambridge Univ Hosp Natl Hlth Serv Trust, Addenbrookes Hosp, Dept Radiol & Gynae Oncol, Cambridge, England
[7] Radiat Oncol Dept, Gustave Roussy Canc Campus Grand Paris, Paris, France
[8] Tata Mem Hosp, Dept Radiat Oncol, Mumbai, India
[9] Inst Oncol, Dept Radiat Oncol, Ljubljana, Slovenia
[10] Mt Vernon Canc Ctr, Canc Ctr, Northwood, Middx, England
[11] Oslo Univ Hosp, Dept Oncol, Oslo, Norway
[12] Postgrad Inst Med Educ & Res, Dept Radiotherapy & Oncol, Chandigarh, India
[13] Univ Alberta, Cross Canc Inst, Dept Oncol, Edmonton, AB, Canada
[14] Univ Hosp Gasthuisberg, Dept Radiat Oncol, Leuven, Belgium
[15] Netherlands Canc Inst, Dept Radiat Oncol, Amsterdam, Netherlands
[16] Univ Montreal, Dept Radiat Oncol, Ctr Hosp Univ Montreal, Montreal, PQ, Canada
[17] Gustave Roussy, Dept Radiotherapy, Villejuif, France
[18] Med Univ Vienna, Gen Hosp Vienna, Dept Radiat Oncol, Comprehens Canc Ctr, Vienna, Austria
[19] Mt Vernon Hosp, Canc Ctr, London, England
[20] Univ Med Ctr Utrecht, Dept Radiat Oncol, Utrecht, Netherlands
[21] Inst Oncol Ljubljana, Dept Radiotherapy, Ljubljana, Slovenia
[22] Oslo Univ Hosp, Norwegian Radium Hosp, Dept Oncol, Oslo, Norway
[23] Cross Canc Inst, Dept Oncol, Edmonton, AB, Canada
[24] Univ Alberta, Edmonton, AB, Canada
[25] St James Univ Hosp, Leeds Canc Ctr, Leeds, W Yorkshire, England
[26] UZ Leuven, Dept Radiat Oncol, Leuven, Belgium
[27] Dept Radiotherapy, Arnhem, Netherlands
[28] St Olavs Hosp, Clin Oncol, Trondheim, Norway
[29] St Olavs Hosp, Womens Clin, Trondheim, Norway
[30] Univ Amsterdam, Acad Med Ctr, Dept Radiat Oncol, Amsterdam, Netherlands
[31] Cambridge Univ Hosp NHS Founda tion Trust, Addenbrookes Hosp, Oncol Ctr, Cambridge, England
[32] Maastricht Radiat Oncol MAASTRO Clin, Maastricht, Netherlands
[33] Hosp Navarra, Dept Radiat Oncol, Pamplona, Spain
[34] Univ Kaposvar, Dept Oncoradiol, Hlth Sci Ctr, Kaposvar, Hungary
[35] British Columbia Canc Agcy, Dept Radiat Oncol, Vancouver, BC, Canada
[36] Med Coll Wisconsins, Dept Radiat Oncol, Milwaukee, WI USA
[37] Univ Iowa, Dept Radiat Oncol, Iowa City, IA 52242 USA
[38] Kuopio Univ Hosp, Dept Obstet & Gynecol, Kuopio, Finland