APA

Ballard D. J., Bryant S. C., O'Brien P. C., Smith D. W., Pine M. B. & Cortese D. A. (19940331). Referral selection bias in the Medicare hospital mortality prediction model: are centers of referral for Medicare beneficiaries necessarily centers of excellence?. : Health services research.

Chicago

Ballard D J, Bryant S C, O'Brien P C, Smith D W, Pine M B and Cortese D A. 19940331. Referral selection bias in the Medicare hospital mortality prediction model: are centers of referral for Medicare beneficiaries necessarily centers of excellence?. : Health services research.

Harvard

Ballard D. J., Bryant S. C., O'Brien P. C., Smith D. W., Pine M. B. and Cortese D. A. (19940331). Referral selection bias in the Medicare hospital mortality prediction model: are centers of referral for Medicare beneficiaries necessarily centers of excellence?. : Health services research.

MLA

Ballard D J, Bryant S C, O'Brien P C, Smith D W, Pine M B and Cortese D A. Referral selection bias in the Medicare hospital mortality prediction model: are centers of referral for Medicare beneficiaries necessarily centers of excellence?. : Health services research. 19940331.