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APA Citation
Somerville, R., Khalil, H., Segurado, R., Mehegan, J., Heinen, M., Murrin, C., & Kelleher, C. (n.d.). p43 The Healthy Worker Effect? Socio-economic and health status determinants of changing self-rated health in older people in the Lifeways Cross-Generation Study of a Thousand Families. Journal of epidemiology and community health, 70, A72. http://access.bl.uk/ark:/81055/vdc_100135538504.0x000033