Opondo, C., Gray, R., Hollowell, J., Li, Y., Kurinczuk, J. J., & Quigley, M. A. (2019). Joint contribution of socioeconomic circumstances and ethnic group to variations in preterm birth, neonatal mortality and infant mortality in England and Wales: A population-based retrospective cohort study using routine data from 2006 to 2012. BMJ Open.

Opondo, Charles, Ron Gray, Jennifer Hollowell, Yangmei Li, Jennifer J. Kurinczuk, und Maria A. Quigley. "Joint Contribution of Socioeconomic Circumstances and Ethnic Group to Variations in Preterm Birth, Neonatal Mortality and Infant Mortality in England and Wales: A Population-based Retrospective Cohort Study Using Routine Data From 2006 to 2012." BMJ Open 2019.

Opondo, Charles, et al. "Joint Contribution of Socioeconomic Circumstances and Ethnic Group to Variations in Preterm Birth, Neonatal Mortality and Infant Mortality in England and Wales: A Population-based Retrospective Cohort Study Using Routine Data From 2006 to 2012." BMJ Open 2019.