NCCLS: Northern California Childhood Leukemia Study-devised measure
Reference and/or access link:
Ward, M.H., Colt, J.S., Metayer, C., Gunier, R.B., Lubin, J., Crouse, V., Nishioka, M.G., Reynolds, P. and Buffler, P.A. (2009). Residential exposure to polychlorinated biphenyls and organochlorine pesticides and risk of childhood leukemia. Environ Health Perspect. 117: 1007–1013.