[1] Radiomed Inst, Dept Radiotherapy, Americo Vespucio Norte 1314 Vitacura, Santiago 7630370, Chile
[2] Serv Salud Metropolitano Norte, Natl Inst Canc, Av Prof Zanartu 1010, Santiago 8380455, Chile
[3] Arturo Lopez Perez Fdn, Oncol Inst, Jose Manuel Infante 805, Santiago 7500691, Chile
[4] Hosp Base Valdivia, Bueras 1003 S-N 14 Reg, Valdivia 5100238, Chile
[5] Oncol Ctr Antofagasta, Pumas 10255, Antofagasta 1267348, Antofagasta, Chile
[6] Univ Mayor, Av Libertador Bernardo O Higgins 2013, Santiago 8340585, Chile
[7] Ingalfarma, Dr Manuel Barros Borgono 71,Oficina 1308, Santiago 7500593, Chile