Johnson, D. J., Greenberg, S. E., Sathiyakumar, V., Thakore, R., Ehrenfeld, J. M., Obremskey, W. T., & Sethi, M. K. (2015). Relationship between the Charlson Comorbidity Index and cost of treating hip fractures: Implications for bundled payment. J Orthop Traumatol.

Johnson, Daniel J., Sarah E. Greenberg, Vasanth Sathiyakumar, Rachel Thakore, Jesse M. Ehrenfeld, William T. Obremskey, and Manish K. Sethi. "Relationship between the Charlson Comorbidity Index and Cost of Treating Hip Fractures: Implications for Bundled Payment." J Orthop Traumatol 2015.

Johnson, Daniel J., et al. "Relationship between the Charlson Comorbidity Index and Cost of Treating Hip Fractures: Implications for Bundled Payment." J Orthop Traumatol 2015.