[1] Hosp San Juan Dios, Oncol, San Jose, Costa Rica
[2] Inst Oncol Nacl, Oncoloy, Panama City, Panama
[3] Honduras Med Ctr, Oncoloy, Tegucigalpa, Honduras
[4] Hosp Metropolitano Vivian Pellas, Oncoloy, Managua, Nicaragua
[5] Inst Oncol Dr Heriberto Pieter, Oncoloy, Santo Domingo, Dominican Rep
[6] Astrazeneca Camcar, Diagnost, San Jose, Costa Rica