[1] Fortnum H.M., Summerfield A.Q., Marshall D.H., Davis A.C., Bamford J.M. (2001). Prevalence of permanent childhood hearing impairment in the United Kingdom and implications for universal neonatal hearing screening: questionnaire based ascertainment study. British Medical Journal 323, 536-539.
[2] Nakisa M., Summerfield A.Q., Nakisa R.C., McCormick B., Archbold S., Gibbin K.P., O’Donoghue G.M. (2001). Functionally equivalent ages and hearing levels of children with cochlear implants measured with pre-recorded stimuli. British Journal of Audiology 35, 183-199.
[3] Summerfield A.Q., Marshall D.H., Barton G.R., Bloor K.E. (2002). Cost-utility scenario analysis of bilateral cochlear implantation. Archives of Otolaryngology — Head and Neck Surgery, 128: 1255-62.
[4] Fortnum H.M., Marshall D.H., Summerfield A.Q. (2002). Epidemiology of the United Kingdom population of hearing-impaired children including characteristics of those with and without cochlear implants — audiology, etiology, co-morbidity, and social demography. International Journal of Audiology, 41, 170-9.
[5] Summerfield A.Q., Nakisa M.J., Archbold S., McCormick B., Gibbin K.P., O’Donoghue G.M. (2002). Use of vocalic information in the identification of ‘S’ and ‘SH’ by children with cochlear implants. Ear and Hearing, 23, 58-77.
[6] Fortnum H.M., Marshall D.H., Bamford J.M., Summerfield A.Q. (2003). Hearing-impaired children in the UK: education setting and communication approach. Deafness and Education International, 4: 123-141.
[7] Barton G.R., Bloor K.E., Marshall D.H., Summerfield A.Q. (2003). Paediatric cochlear implantation: multi-centre retrospective cost analysis. International Journal of Paediatric Otorhinolaryngology, 67: 141-149.
[8] Barton G.R., Marshall D.H., Bloor K.E., Summerfield A.Q. (2004). Influences of the scale and scope of activity on the cost of paediatric cochlear implantation. International Journal of Audiology, 43:369-76.
[9] Barton G.R., Bankart J., Davis A.C., Summerfield A.Q. (2004). Comparing utility scores before and after hearing-aid provision: Results according to the EQ-5D, HUI3, and SF-6D. Applied Health Economics and Health Policy, 3: 103-5.
[10] Summerfield A.Q., on behalf of the United Kingdom Cochlear Implant Study Group. (2004). Criteria of candidature for unilateral cochlear implantation in post-lingually deafened adults I: Theory and measures of effectiveness.  Ear and Hearing, 25: 310-335.
[11] Barton G.R. and Summerfield A.Q., on behalf of the United Kingdom Cochlear Implant Study Group. (2004). Criteria of candidature for unilateral cochlear implantation in post-lingually deafened adults II: Cost-effectiveness analysis.  Ear and Hearing, 25: 336-360.
[12] Summerfield A.Q. and Marshall D.H., on behalf of the United Kingdom Cochlear Implant Study Group. (2004). Criteria of candidature for unilateral cochlear implantation in post-lingually deafened adults III: Prospective evaluation of an actuarial approach to defining a criterion.  Ear and Hearing, 25: 361-374.
[13] Summerfield A.Q., Cirstea S.E., Roberts K.L., Barton G.R., Graham J.M., O’Donoghue G.M. (2005). Incidence of meningitis and of death from all causes among users of cochlear implants in the United Kingdom. Journal of Public Health, 27: 55-61.
[14] Stacey, P.C., Fortnum, H.M., Barton, G.R., & Summerfield, A.Q. (2006). Hearing-impaired children in the UK I: Auditory performance, communication skills, educational achievements, quality of life, and cochlear implantation. Ear and Hearing, 27, 161-186.
[15] Barton, G. R., Stacey, P. C., Fortnum, H. M., & Summerfield, A. Q. (2006). Hearing-impaired children in the UK II: Cochlear implantation and the cost of compulsory education. Ear and Hearing, 27, 187-207.
[16] Barton, G. R., Fortnum, H. M., Stacey, P. C., & Summerfield, A. Q. Hearing-impaired children in the UK III: Cochlear implantation and the economic costs incurred by families. Ear and Hearing, 27, 563-574.
[17] Barton, G. R., Fortnum, H. M., Stacey, P. C., & Summerfield, A. Q. Hearing-impaired children in the UK IV: Cost-effectiveness of paediatric cochlear implantation. Ear and Hearing, 27, 575-588.
[18] Fortnum HM, Stacey PC, Summerfield AQ. (2006). An exploration of demographic bias in a questionnaire survey of hearing-impaired children: Implications for comparisons of children with and without cochlear implants. Int J Pediatr Otorhinolaryngol. [Epub ahead of print].
[19] Summerfield AQ, Barton GR, Toner J, McAnallen C, Proops D, Harries C, Cooper H, Court I, Gray R, Osborne J, Doran M, Ramsden R, Mawman D, O'driscoll M, Graham J, Aleksy W, Meerton L, Verschure C, Ashcroft P, Pringle M. (2006). Self-reported benefits from successive bilateral cochlear implantation in post-lingually deafened adults: randomised controlled trial. International Journal of Audiology. Suppl:99-107.
[20] Fortnum HM, Stacey PC, Barton GR, Summerfield AQ. National Evaluation of Support Options for Deaf and Hearing-impaired Children: Relevance to education services. (In Press) To be published in Deafness and Education International.