Andrews, N., Waight, P. A., Borrow, R., Ladhani, S., George, R. C., Slack, M. P. E., & Miller, E. (2011). Using the Indirect Cohort Design to Estimate the Effectiveness of the Seven Valent Pneumococcal Conjugate Vaccine in England and Wales. Public Library of Science.

Andrews, Nick, Pauline A. Waight, Ray Borrow, Shamez Ladhani, Robert C. George, Mary P. E. Slack, and Elizabeth Miller. Using the Indirect Cohort Design to Estimate the Effectiveness of the Seven Valent Pneumococcal Conjugate Vaccine in England and Wales. Public Library of Science, 2011.

Andrews, Nick, et al. Using the Indirect Cohort Design to Estimate the Effectiveness of the Seven Valent Pneumococcal Conjugate Vaccine in England and Wales. Public Library of Science, 2011.