From "The Uneven Landscape of Newborn Intensive Care Services: Variation in the Neonatology Workforce" Effective Clinical Practice, July/August 2001. 4:143-149.
Appendix Figure 1. Derivation of three localization indices. A localization index of 1 indicates no border crossing; a localization of 0.75 means that border crossing has occurred in 25% of cases. VLBW = very low birth weight.>