University of Texas at Houston - MD Anderson Cancer Center, Clinical Central del Eje, Buenos Aires Fundaleu, Universidade Estadual de Campinas (UNICAMP), Hospital Nacional Edgardo Rebagliati Martins, Hospital Nacional Edgardo Rebagliati Martins, Kagoshima University, Instituto Nacional de Enfermedades Neoplásicas (INEN), Armando Milan Castro, La Liga Nacional Contra el Cáncer (INCAN), Universidad Autónoma de Sinaloa, A.C. Camargo Cancer Center, University of Sao Paulo, Universidade do Estado do Rio de Janeiro (UERJ), Universidade Estadual de Campinas (UNICAMP), Santa Casa de São Paulo - School of Medical Sciences, British Hospital, Ophir Loyola Hospital, Hospital Italiano de Buenos Aires, Hospital Italiano de Buenos Aires, Hospital Alexander Fleming, Hospital Profesor Alejandro Posadas, Hospital del Salvador, Universidad Central de Venezuela, Hospital Aleman, Instituto de Previsión Social, Instituto Oncol´ogico Fundaci´on Arturo L´opez P´erez, Hospital Central IPS, University of Texas at Houston - MD Anderson Cancer Center and Santa Casa de São Paulo - School of Medical Sciences