Ballard, D. J., Bryant, S. C., O'Brien, P. C., Smith, D. W., Pine, M. B., & Cortese, D. A. (1994). Referral selection bias in the Medicare hospital mortality prediction model: Are centers of referral for Medicare beneficiaries necessarily centers of excellence?

Ballard, D J., S C. Bryant, P C. O'Brien, D W. Smith, M B. Pine, ja D A. Cortese. Referral Selection Bias in the Medicare Hospital Mortality Prediction Model: Are Centers of Referral for Medicare Beneficiaries Necessarily Centers of Excellence? 1994.

Ballard, D J., et al. Referral Selection Bias in the Medicare Hospital Mortality Prediction Model: Are Centers of Referral for Medicare Beneficiaries Necessarily Centers of Excellence? 1994.