Methods This is a multicentric study involving the formation of two patient cohorts derived from the Pathology Department and/or Oncology Services of several oncology centers: Hospital de Oncología Centro Médico Nacional Siglo XXI (CMN SXXI IMSS), Hospital de Alta Especialidad 25 (IMSS), Centro Médico Nacional Manuel Ávila Camacho (IMSS), Hospital General de Zona 1A (IMSS), Centro Médico ABC, Hospital de Alta Especialidad 25 (IMSS) and Unidad Médica de Atención Ambulatoria (UMAA 199).