Gannon, B., Layte, R., McGregor, P., Madden, D., Nolan, A., O'Neill, C., and Smith, S. (2007). The Provision and Use of Health Services, Health Inequalities and Health and Social Gain, Dublin: ESRI, https://www.esri.ie/publications/the-provision-and-use-of-health-services-health-inequalities-and-health-and-social-gain