Searching for an improved clinical comorbidity index for use with ICD-9-CM administrative data
William A. Ghali
,
Ruth Hall
,
Amy K. Rosen
,
William A. Ghali
,
Ruth Hall
,
Amy K. Rosen
,
Arlene S. Ash
,
Mark A. Moskowitz
1996
Journal of Clinical Epidemiology
242 citations