Universidad San Francisco de Quito (USFQ), World Health Organization - Polio Eradication Department, Universidad San Francisco de Quito (USFQ), Government of the United States of America - Division of Viral Diseases, Government of the United States of America - Division of Viral Diseases, Pan American Health Organization, Pan American Health Organization, National Polio Certification Commission, National Polio Certification Commission, National Polio Certification Commission, Ministry of Public Health (Ecuador), Ministry of Public Health (Ecuador), Universidad UTE, Pan American Health Organization - Immunization Unit, Pan American Health Organization - Immunization Unit and World Health Organization - Polio Eradication Department

Universidad Autónoma del Estado de México - Facultad de Geografía, Universidad Autonoma del Estado de Mexico, Universidad Autonoma del Estado de Mexico and Universidad UTE