Thornquist MD, Urban N, Tseng A, Edelstein C, Lund B, Omenn GS. Research cost analyses to aid in decision making in the conduct of a large prevention trial, CARET. Carotene and Retinol Efficacy Trial. Control Clin Trials. 1993 Aug;14(4):325-39.
Thornquist MD, Urban N, Tseng A, Edelstein C, Lund B, Omenn GS. Research cost analyses to aid in decision making in the conduct of a large prevention trial, CARET. Carotene and Retinol Efficacy Trial. Control Clin Trials. 1993 Aug;14(4):325-39.