[1] Ctr Oncol Estatal ISSEMYM, Oncol Dept, Toluca De Lerdo, Mexico
[2] Univ Republica, Dept Oncol Med, Montevideo, Uruguay
[3] INCAN Inst Nacl Cancerol, Med Oncol, Mexico City, Mexico
[4] Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Hematooncol Dept, Mexico City, Mexico
[5] Dr Rixci Augusto Ramirez Fallas, Oncol Serv, Guatemala City, Guatemala
[6] Ctr Med Nacl 20 Noviembre ISSSTE, Oncol Med Dept, Mexico City, Mexico
[7] Hosp Reg ISSSTE Leon, Med Oncol Dept, Leon, Mexico
[8] Ctr Med Noreste UMAE 25, Oncol, Monterrey, Mexico
[9] Dr Salvador Macias Diaz Oncol Med, Med Oncol Dept, Puebla, Mexico
[10] Ctr Med Nacl 20 Noviembre ISSSTE, Dept Oncol Pediat, Mexico City, Mexico
[11] Caja Petr Salud, Oncol Dept, Santa Cruz, Bolivia
[12] Hosp Pediat Ctr Med Nacl Occidente, Pediat Oncol, Guadalajara, Mexico
[13] Hosp Materno Infantil ISSEMYM, Pediat Oncol, Toluca, Mexico
[14] Ctr Oncol Caja Nacl Salud, Dept Oncol Med, La Paz, Bolivia
[15] Hosp Gen Zona 36, Inst Mexicano Seguro Social, Pediat Oncol, Coatzacoalcos, Mexico
[16] Hosp Infantil Estado Sonora, Pediat Oncol, Hermosillo, Mexico
[17] Hosp Infantil Mexico Dr Federico Gomez, Ctr Estudios Econ & Socialescos, Ctr Estudios Econ & Soci Salud, Mexico City, Mexico
[18] INCAN Inst Nacl Cancerol, Med Oncol Dept, Mexico City, Mexico
[19] Ctr Oncol Estatal ISSEMYM, Oncol Med, Toluca, Mexico
[20] Queens Univ, Dept Oncol, Sch Med, Kingston, ON, Canada