Cochlear implants for children and adults with severe to profound deafness.
National Institute for Health and Clinical Excellence (NICE) - 2009. NGC.

Pneumococcal vaccination for cochlear implant candidates and recipients: updated recommendations of the Advisory Committee on Immunization Practices. Centers for Disease Control and Prevention - Federal Government Agency [U.S.]. 2003.

Inmunization recomendations for cochlear implant recipients. CMA Infobase. 2003.