Key points are not available for this paper at this time.
A study of health referral patterns. J G Cauffman, J S Lloyd, M L Lyons, P A Cortese, R L Beckwith, D W Petit, P F Wehrle, E McBroom, and J R McIntireCopyRight https://doi.org/10.2105/AJPH.64.4.331 Published Online: October 07, 2011
Cauffman et al. (Mon,) studied this question.